They are releasing a Terraform provider which is a little limited for now and they stated that bicep would be coming at a later date. But that is not on this year's projected roadmap...

Now that they are moving all of the data platform to fabric, they made a special new rest APi and cli tool and started development on a python library for ci/cd and fabric deployment pipelines instead of sticking with bicep and ado pipelines. So much for unification...

Entra and m365 are both graph only and I don't believe they are available using Bicep. Unless you are saying that entra id is now available via bicep (preview). That would at least be helpful if not late.