A Filter for Set: "contains" value of "search bar"

Is your feature request related to a problem? Please describe.
To be able to know if an object is already in a set.

Describe the solution you’d like
having a filter in a set: for showing only the content that matches the ‘value’/‘string’ in the set-search-field (‘Notion’ has these search fields for tables).
At the moment there is no search field in a set, but I guess that will come later, so this is a feature request in advance.

Describe alternatives you’ve considered

Additional context