How to filter choices by distance to geopoint?

No problem.

I really wanted to add that I have a case where the form works very well with the Pullkdata function in its web version (enketo), but not in KoboCollect

I assume you are referring to this: Having issues with pulldata functions in my form - #2 by Cesar_Rivas_HN

Can you please start a new Support topic, and post your specific form and explain how it is/not working between Enketo and KoboCollect, and we can take a look at it.