Query Builder not working with Virtual Entity

[co-sic]

Describe the bug

I'm not sure if this is something that is intended to work, so feel free to close this issue if this is out of scope or not intended to work.
I have defined a Virtual entity with an expression and this is working fine if i query it through the entity manager. But if i create a query builder for this entity, it just treats the entity as a DB table and tries to select that (non-exsisten) table, ignoring the expression.
My current use case is, that i have an existing FilterQuery (which is dynamically generated) for a Virtual Entity. I know need to use this FilterQuery inside of the knex query builder for an complex aggregation query.

Reproduction

https://github.com/co-sic/node-mikro-orm-playground

What driver are you using?

@mikro-orm/postgresql

MikroORM version

6.0.0-rc.3

Node.js version

20.9.0

Operating system

No response

Validations

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• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Slack.
• The provided reproduction is a minimal reproducible example of the bug.

[B4nan]

It's not supposed to work this way now, but maybe it could. And if not, we can at least add a validation there.