Can't convert question into models when using Mongo DB

I can't covert my question into Model when I have create question in Mongo DB. See the screen short no option found for covert it into Model.
Is this a limitation or Did I miss something?

Hi @varnika
Because Mongo currently doesn't support nested queries:
https://github.com/metabase/metabase/issues/5645 - upvote by clicking :+1: on the first post