Even if you find one, the experience is poor:
Assuming you have found an "Android TV 13 GSI .img" file, here is how to turn it into a bootable firmware. Android Tv 13 Iso
Because users coming from x86 platforms (like running Android on a PC using Bliss OS or PrimeOS) are used to ISO files for USB booting. However, for ARM-based Android TV boxes (the market standard), you need .img files. Even if you find one, the experience is
The search for an is primarily driven by owners of aging Android TV boxes (e.g., Xiaomi Mi Box S, Nvidia Shield) who want newer features. Unfortunately, there is no plug-and-play ISO. The search for an is primarily driven by
The most reliable source for Android TV 13 GSI is (specifically the TrebleDroid or phhusson repositories) or XDA Developers Forums .
Strictly speaking, Google does not release official ISO files for Android TV. An ISO is a disc image format for PCs (x86 architecture). Android TV runs primarily on ARM chips (like those in Smart TVs and Shield TV).
You can run it on a small partition via dual-boot or entirely from a USB drive.