Are there limits on number of Google Analytics 4 dimension values?

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I am trying to work out whether there are any limits on the number of unique event_params.value.string_value's for a particular event_params.key in GA4? In this case I have a custom event called dispatch with a custom event_params.key called action. event_params.value.string_value has values like BUILDING_USE, MOVE_MOBILE_UNIT etc. I am seeking to find out whether there are any limits as to how many different values this can take? Can we send through an unlimited variety of different string_values here or is there a limit on this?

Here is a screenshot of what it looks like in BigQuery:

Google Analytics BigQuery screenshot

This is how it looks in Google Analytics itself:

enter image description here

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