I am going to take a wild guess and say -- it is 6.1 so.. things added to six that didnt make it into the deadline. Quick read of the changelog page shows RISC-V and ARM being filled out, other architectures active too.. and since they had some time, lining up the security gates to add spec-driven sorts of things, which always lag it seems.

All that said, I have not gotten over some early experiences with QEMU myself, which ended up being not very productive. Cowardly I retreated to vbox for daily use on a small network.. maybe 6 series has a different feel for the individual setup now.