This is guide, howto upgrade Fedora 34 to Fedora 35 using DNF. This method works on desktop and server machines. You can also upgrade older Fedora installations (example Fedora 33/32/31/30) directly to Fedora 35.

Check full guide with commands:
https://www.if-not-true-then-false.com/2021/upgrade-fedora-35-using-dnf/