PSA: It looks like all Fire TV sticks are no longer compatible because they were running off of 32-bit Android instead of 64-bit.
To clarify, the hardware is 64-bit compatible, but for some reason Amazon decided to continue to use the 32-bit Android operating system. Their newer devices are expected to all be using 64-bit os’s, though possibly using their new “Vega OS” based on Linux instead of Android. Though their intent is to make things less compatible in a locked ecosystem where you can’t easily side load APKs (which will no longer work), and will require all apps to rebuilt specifically for them so they can maintain control and monetization in a closed system… Though the performance will be better. Tiny cam Dev implies he’ll probably support it though.