Dropdown list linked to a board


I’m using the VLOOKUP app to retreive data from other boards because I need to use the data for multiple purposes that can’t be done with mirror columns.

The part where it’s getting problematic is that I can’t link the content of the dropdown list to the list of items in the other table. In this case, the Connect to board column is exactly what I’m looking for. Except that I can’t use it in forms and that mirror columns don’t fit my need.

So my request is : could you make a mix of both solutions ?