⏳ Allow to query multiple sources at once in the Loop Grid

Prerequisites

• I have searched for similar features requests in both open and closed tickets and cannot find a duplicate.
• The feature is still missing in the latest stable version of Elementor ( Elementor Pro )

What problem is your feature request going to solve? Please describe.

Elementor's loop grid currently only allows to source from a single type (Post, Page or Custom Post type)

Describe the solution you'd like

It would be nice to to be able to query from multiple post types.

Describe alternatives you've considered

We have tried to query by multiple taxonomies, but the taxonomies are still govern by the single source of post type. So this doesn't really solve the issue.

Additional context

_No response_