No. Using two receivers what some guys did in the early days of Atmos, before things were a little more affordable and accessible. I have 7.x.4 in my house. I used a Marantz 6012, with 11ch processing, but only channels of power. Long before I went to Atmos, I added a two channel amp for my LR mains. Now, I still do that, but my AVR powers all surrounds, and tops.
So, in your case I’d recommend doing the same. BUT, if your couch is against the back wall(which iirc it’s not)I would not go for 7ch bed layer. And depending on how close the couch is to the back wall, I might only go 5.x.2.
However, if you have a few feet behind the couch, then 7.x.4 should be an easy choice.