Pre-populated or pre-filled forms

Hi!

Default values or automations don´t seem to work with what I’m proposing.
We often share forms with external partners/clients. We might only use one board for several clients, but we would like to share with them a prepopulated form with their data, so that neither them or us have to fill those.
I have seen a topic suggesting to be able to modify URL with query parameters, which would avoid having several forms per board, but just prefilled data would be awesome and more friendly user.

Hope to hear from you soon!