EOS RP is actually the most suitable for live broadcast. Although the performance is not as good as R6, Quan Huafu's RP upgrade is enough for Canon M50. The performance of R6 is too good, which will lead to a lot of performance surplus in live broadcast.

R6 is not the high-end of Canon camera, and it will be better after it is available. After upgrading the fuselage from RP in the next year or two, there will be more choices, and then choose, knowing which weaknesses of the camera are really your pain points, it will be much easier to choose.