I have tested the upgrade from F-33 to F-34 on Workstation-Live VM, it worked fine for me.
Steps:
1. dnf system-upgrade download --releasever=34 --enablerepo=updates-testing
2. dnf system-upgrade reboot
BZ#1948197 ibus-anthy upgrade script freezes system
Tested updating Fedora-34 VM to F-34 RC-1.1 on VM.
Observations: Update was smooth, used RC-1.1 repo.
Steps: