Form Prefill → Multiple Select → All Values Selected

I’m using Airtable to manage an online community that relies heavily on SMS text notifications. When members want to change their settings, they text a number and receive a link to modify their settings. I’m using a prefilled Airtable form to do this and it works great, except that I have very large multiple select field that needs to prefill with all options selected.

In order to accomplish this, the prefilled form URL ends up being SUPER LONG. Also, anytime I add additional options to that multiple select field (which happens a couple times a month), I have to remember to go update my prefilled form URL template.

I would love to see support for a simple URL modifier that prefills all available values in the multiple select field in one shot. Something nice and short like ‘=all_values’.