GA4 Query explorer cannot use dimension filter without having the dimension in the query

[McGern]

What page is this happening on
Query explorer GA4

Describe the bug
When using UA query explorer the user was able to filter on dimensions without having that dimension return as part of the query. This was useful for getting totals of a dimensions without to return the dimension in the data.

Using the GA4 interface in query explorer, if you do not have the dimension returned in the query, you cannot filter on it.

To Reproduce
Steps to reproduce the behavior:

1. Go to Query explorer for GA4
2. Add a metric to query on e.g. "screenPageViews"
3. Leave the "dimensions" field blank
4. Attempt to add a dimension filter
5. NOTE: The JSON request will not include the dimension filter
6. Pressing "Make request" will not return the expected data

Expected behavior
The user should be able to add dimension filters where those dimensions aren't returned in the query.
The user should be able to autocomplete on filters that aren't included in the dimensions field.
The user should be able to see the JSON request with the dimension filters that were added.
The search results should be filtered based on the dimension filters added.

Screenshots

[richard-h-ward]

the filter doesn't seem to work even when the filtered dimension is added as a requested dimension