Upgrading to mirrorless

I am an entry-level photographer, but I have been booking several clients. Mainly portraits, families, and I just shot my first wedding. Currently have a rebel T7 with a 50 mm 1.8 lens. This is an amazing camera and has taught me so much about manual, focus, composition, etc. however it does have its limited capabilities, one of which is the slow focus and not as many frames per second. I feel like this really slows me down when taking images so I am looking to upgrade to a mirror camera. Currently looking at the Canon R 50 in the Canon R 10. don’t really see too much of a difference between these two except for the price what is everyone’s recommendations for my first mirror camera? I will also probably be purchasing a new lens. Don’t have a super high budget (or I would be getting the Mark II body lol)

Nice comments only. Thank you for your help!