This is the list. It seems to be loaded in the middle of the list.In folder name there is a folder named linux-header-4.9.24 instead of linux-headers-amlogic-4.9. That’s why I think a lot of things conflict. But I also wrote in different parts of the forum. I’m not sure exactly!
khadas@Khadas:~$ apt list 'linux-headers*'
Listing... Done
....
.... i cut .....
linux-headers-5.3.0-62-generic-lpae/bionic-security,bionic-updates 5.3.0-62.56~18.04.1 armhf
linux-headers-5.3.0-64/bionic-security,bionic-security,bionic-updates,bionic-updates 5.3.0-64.58~18.04.1 all
linux-headers-5.3.0-64-generic/bionic-security,bionic-updates 5.3.0-64.58~18.04.1 arm64
linux-headers-5.3.0-64-generic-lpae/bionic-security,bionic-updates 5.3.0-64.58~18.04.1 armhf
linux-headers-5.4.0-1013-raspi/bionic-security,bionic-updates 5.4.0-1013.13~18.04.1 arm64
linux-headers-5.4.0-1015-raspi/bionic-security,bionic-updates 5.4.0-1015.15~18.04.1 arm64
linux-headers-5.4.0-1016-raspi/bionic-security,bionic-updates 5.4.0-1016.17~18.04.1 arm64
linux-headers-5.4.0-1018-aws/bionic-updates 5.4.0-1018.18~18.04.1 arm64
linux-headers-5.4.0-1018-raspi/bionic-security,bionic-updates 5.4.0-1018.20~18.04.1 arm64
linux-headers-5.4.0-1019-raspi/bionic-security,bionic-updates 5.4.0-1019.21~18.04.1 arm64
linux-headers-5.4.0-1020-aws/bionic-security,bionic-updates 5.4.0-1020.20~18.04.2 arm64
linux-headers-5.4.0-1022-aws/bionic-security,bionic-updates 5.4.0-1022.22~18.04.1 arm64
linux-headers-5.4.0-1024-aws/bionic-security,bionic-updates 5.4.0-1024.24~18.04.1 arm64
linux-headers-5.4.0-1025-aws/bionic-security,bionic-updates 5.4.0-1025.25~18.04.1 arm64
linux-headers-5.4.0-37-generic/bionic-security,bionic-updates 5.4.0-37.41~18.04.1 arm64
linux-headers-5.4.0-37-generic-lpae/bionic-security,bionic-updates 5.4.0-37.41~18.04.1 armhf
linux-headers-5.4.0-39-generic/bionic-security,bionic-updates 5.4.0-39.43~18.04.1 arm64
linux-headers-5.4.0-39-generic-lpae/bionic-security,bionic-updates 5.4.0-39.43~18.04.1 armhf
linux-headers-5.4.0-40-generic/bionic-security,bionic-updates 5.4.0-40.44~18.04.1 arm64
linux-headers-5.4.0-40-generic-lpae/bionic-security,bionic-updates 5.4.0-40.44~18.04.1 armhf
linux-headers-5.4.0-42-generic/bionic-security,bionic-updates 5.4.0-42.46~18.04.1 arm64
linux-headers-5.4.0-42-generic-lpae/bionic-security,bionic-updates 5.4.0-42.46~18.04.1 armhf
linux-headers-5.4.0-45-generic/bionic-security,bionic-updates 5.4.0-45.49~18.04.2 arm64
linux-headers-5.4.0-45-generic-lpae/bionic-security,bionic-updates 5.4.0-45.49~18.04.2 armhf
linux-headers-5.4.0-47-generic/bionic-security,bionic-updates 5.4.0-47.51~18.04.1 arm64
linux-headers-5.4.0-47-generic-lpae/bionic-security,bionic-updates 5.4.0-47.51~18.04.1 armhf
linux-headers-5.4.0-48-generic/bionic-security,bionic-updates 5.4.0-48.52~18.04.1 arm64
linux-headers-5.4.0-48-generic-lpae/bionic-security,bionic-updates 5.4.0-48.52~18.04.1 armhf
linux-headers-amlogic-4.9/bionic,now 0.9 arm64 [installed] >>>>>>>>>>>>>>okkkkkkkk
linux-headers-amlogic-mainline/bionic 0.9 arm64
linux-headers-aws/bionic-security,bionic-updates 5.4.0.1025.10 arm64
linux-headers-aws-edge/bionic-security,bionic-updates 5.4.0.1025.10 arm64
linux-headers-aws-lts-18.04/bionic-security,bionic-updates 4.15.0.1083.85 arm64
linux-headers-generic/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-generic-hwe-16.04/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-generic-hwe-16.04-edge/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-generic-hwe-18.04/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
linux-headers-generic-hwe-18.04-edge/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
linux-headers-generic-lpae/bionic-security,bionic-updates 4.15.0.118.105 armhf
linux-headers-generic-lpae-hwe-16.04/bionic-security,bionic-updates 4.15.0.118.105 armhf
linux-headers-generic-lpae-hwe-16.04-edge/bionic-security,bionic-updates 4.15.0.118.105 armhf
linux-headers-generic-lpae-hwe-18.04/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 armhf
linux-headers-generic-lpae-hwe-18.04-edge/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 armhf
linux-headers-raspi-hwe-18.04/bionic-security,bionic-updates 5.4.0.1019.23 arm64
linux-headers-raspi-hwe-18.04-edge/bionic-security,bionic-updates 5.4.0.1019.23 arm64
linux-headers-raspi2/bionic-security,bionic-updates 4.15.0.1071.68 arm64
linux-headers-raspi2-hwe-18.04/bionic-security,bionic-updates 5.3.0.1033.23 arm64
linux-headers-snapdragon/bionic-security,bionic-updates 4.15.0.1087.90 arm64
linux-headers-snapdragon-hwe-18.04/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
linux-headers-snapdragon-hwe-18.04-edge/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
linux-headers-virtual/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-virtual-gkeop-5.0/bionic-security,bionic-updates 5.0.0.61.115 arm64
linux-headers-virtual-hwe-16.04/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-virtual-hwe-16.04-edge/bionic-security,bionic-updates 4.15.0.118.105 arm64
linux-headers-virtual-hwe-18.04/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
linux-headers-virtual-hwe-18.04-edge/bionic-security,bionic-updates 5.4.0.48.52~18.04.42 arm64
........ i cut