postmarketOS is based on Alpine Linux. Pop!_OS is based on Ubuntu. There are lots of AOSP-based mobile OSes, including LineageOS, Graphene, Amazon's Fire OS,

postmarketOS is based on Alpine Linux. Pop!_OS is based on Ubuntu. There are lots of AOSP-based mobile OSes, including LineageOS, Graphene, Amazon's Fire OS, CalyxOS and /e/ OS. https://en.wikipedia.org/wiki/List_of_custom_Android_distributions https://en.wikipedia.org/wiki/List_of_custom_Android_distrib... But neither of yours are.