Solution: Install Kernel 6.0.7 in Dom0 (works in both 4.1 and 4.2)
dom0$ qubes-dom0-update kernel-6.0.7 (in 4.2 /fc 37)
(note that qubes kernel-latest is newer and doesn’t work, so something in newer kernels breaks suspend)
For Qubes 4.1 (fc32)
The package exists
https://ftp.qubes-os.org/repo/yum/r4.1/current-testing/dom0/fc32/rpm/kernel-latest-6.0.7-1.fc32.qubes.x86_64.rpm
but won’t install when I run
sudo qubes-dom-update --releasever=4.1 --enablerepo=qubes-dom0-currrent-testing kernel-latest-6.0.7
“unable to find a match”
I pulled it manually, moved to dom0 and ran dnf install
Props to @cayce for suggesting the right answer