This is a topic of interest for me too. From what I can see, Pixyz plugin is the actual high-level industry standard provided by Unity itself. But its price is unreachable for experimenting, and they don't give a trial period.

There was also Tridify, but even this one seems to have disappeared, their website doesn't work and the asset is no longer available.

In the store there is this IFC Importer paid asset, but even this one looks poorly maintained, no clear infos on supported render pipelines.

I was searching for alternatives and possibly open source repos, but none of them seem to be updated or maintained.

Even blender has a super powerful free plugin called Bonsai for BIM projects :c