Yeah, I have a Roborock S7 MaxV I bought about two years ago and was hoping I could put open source firmware on it but after some searching I learned that Roborock makes a lot of similar but different flavors within a generation like S7 and they can be quite different. Unfortunately, it appears my MaxV flavor of the S7 isn't rootable.

For those interested: This Reddit post had more info https://www.reddit.com/r/Roborock/comments/vlvep2/roborock_s... and a sub-post there linked to this Defcon presentation on rooting Roborock vacs https://dontvacuum.me/talks/DEFCON29/DEFCON29-vacuum-robots.....