Thank you! I was able to recreate your method!
I realized my use case is different, hence why it wasn’t originally working.
I have a bookings table from which someone can select a room or multiple room.
After they’ve selected rooms, I want to redirect them to a form with the unique codes to access the room prefilled.
I don’t want to provide the access codes prior to completing the booking because they could select rooms/access codes without hitting submit to complete the reservation.
I’m going to tinker some more to see what I’m trying to accomplish is possible.
Thanks again! Very much appreciated.