It eventually will. But OP never asked about M5 specifically.
Eventually in this context might be 4+ years from now.
AFAIK Asahi development needs some hypervisor features for reverse engineering macOS drivers that only exist on M1-M3 and were removed on M4+. So yeah, it may be several years until they get support (or never, if nobody steps up to do it).
No, but OP was comparing the pricing of brand new laptops, so it was implied that they wouldn't be M1/M2 hence not supported by Asahi.