I’m sure there are lots of them with lots of differing features, which is why I asked you what features you want that are not in the Ultra. You already listed features you don’t need.Do you know what a AV pre amplifier is?
Do you need 7.1 output? Atmos? (I don’t know what that would look like.)
To me, the Ultra is already an AVR. It has two inputs suitable for connecting a TV. But it’s only stereo. Is that why it isn’t an AVR?