Ironically this is a security focused thread. The solution here isn’t to switch to a Linux phone, a platform that has absolutely atrocious security, especially compared to even stock iOS/Android. The only alternative that actually increases privacy and security is GrapheneOS. If one doesn’t want to buy a Pixel in order to have it, they can wait and see what the new OEM that will support GOS will be later this year before deciding if it’s worth waiting for in 2027.
You seem to forget that Android and Graphene are built on a Linux kernel.