Make Form Submit Button a Guided Landing Page Variable

I'd like the ability to have the submit button text in a form be a variable that can be set in a guided landing page. It is possible to set the submit button text to a token (e.g. {{my.Submit Button Text}})--if the landing page lives within a program.

However, for landing pages in design studio, it isn't possible to re-use the same form across multiple landing pages if the submit button text is different. I'd like to be able to set the form submit button to something like ${submit-button-text} and then set this at the landing page level for more dynamic forms. This would prevent having to create duplicate form assets just to change what the button says. I could write some JS to do this dynamically, but this feels like something that should be out of the box.