Yes, it's just a downstream fork of chromium. It can run any extension that runs on the equivalent upstream build of chromium.
For the same reasons you can install it on Librewolf too, and it actually comes with ublock origin pre-installed.
For the same reasons you can install it on Librewolf too, and it actually comes with ublock origin pre-installed.
Therefore, no, it cannot run uBlock Origin, or soon will be unable to run it.
No chromium-based browser currently plans to keep MV2 support. It's just not feasible for a small group to keep it maintained ontop of the inevitable breaking changes that will be introduced in upstream over time.
If this bothers you, use a real browser that isn't sourced from an ad company.
Otherwise, you'll be getting exactly what you should expect, and nothing more.