Can't license 365 groups anymore

Ever since group based licensing was moved from Entra to 365 admin, it's no longer possible to apply licenses to to 365 groups. This is clearly broken and needs fixing. What's the process to raise this with Microsoft? I tried using Graph but that's also broken, even when following the MS doc.

I raised a support case but they guy that called back was absolutely useless, didn't even know what I was talking about.