The only aftermarket company I have seen that has frame sliders listed as direct fitment for the new R7 is T-Rex Racing. Their sliders are listed here on their website - T-Rex Racing 2022 Yamaha YZF-R7 No Cut Frame Sliders
From what I understand, frame sliders for the MT-07 should bolt up to the R7/utilize the same hardware - and since it is the same engine I imagine the length should be appropriate, but again it is difficult to say for certain with the bike being so new. The main thing you would want to be aware of is ensuring that the engine-side slider/puck sticks out far enough past the engine case, so it'll do its job protecting that from damage. Since the R7 is supposedly Yamaha's narrowest model yet, I imagine siders for the MT-07 would work.
You could try taking measurements, and request the length/dimensions of a given frame slider set from its manufacturer to ensure the length is appropriate; it is frustrating waiting for parts/fitment, esp. with parts in general being in short supply right now with manufacturing still catching-up from the shut down.