Who exactly cares about C++20? Most (mis)features of the “standard” won’t be used for years anyway, until the codegen stabilizes and performance impact will be known. Most of people in these communities never got a dollar for a line of C++, and people who did rarely express their opinion (but you can still find it online if you try)
Clang first should spend it's resources catching up with C++20, instead of spending them on C++23. The standard is yet to be fully finished.