Hi @knowlec,
you could try to hold your values in a Tulip Table and use a table aggregation as source for the dropdown.
But this is not “as you type”, this only works after triggering the table aggregation.
You could build a change detector for your input variable with custom widgets but then it starts getting complicated for this use case.
Please also have a look at these similar topics:
Using Values In One Single Select Menu to Dynamically Populate Values in a Second Single Select Menu (Part 1) - Show and tell - Tulip Community