Is Khadas going to bring OOWOW to VIM3L?

yes oowow for vim3l same as for all other boards will be soon, at this moment please use Krescue (with less features)

PS: oowow as embedded service will works for new devices like VIM4 Edge2 etc…for old devices VIM1 VIM2 VIM3 VIM3L Edge works from removable devices SD card or usb Flash