Well, the simplest way to go if you want opensuse-like rollbacka would be to just run opensuse... if you need ubuntu-specific stuff (you don't) there's distrobox.
BTW I've been running tumbleweed for a few years now and didn't roll back once... IDK if the craze about rollbacks and immutable distros (arguments in favour of which often boil down to "easy rollbacks") is justfied or not.
I am using Tumbleweed on my home desktop for close to 10 years now and I have used the rollback on 3-4 occasions. Probably could have fixed 1-2 of those issues in another way, but I was to lazy and just wanted to get back to more "stable system" asap and wait for further updates to fix the issues.
Yeah I actually use time shift on my main system but my boot/efi is fat32 so it doesn't get restored during snapshot rollback resulting in failed boot if kernel was changed .I guess there is a few complicated solutions to that. Also on fedora time shift is not supported anymore (?)
On Crystal Linux, you do your thing, screw your OS, reboot to choose a snapshot that was made automatically without your intervention, and that's it. Nothing ever really breaks.