Use Formulas with Business Rules To Set A Field Value

I would like the ability to use a formula to set a field value. An example might be to generate a web-link with a hard-coded base URL with an appended page parameter Id. In the classic UI I could create a CTA that pushed the user back to an internal page that had a hard-coded URL with an appended page record value. That isn't easily done with the new low-code tools for buttons.

Another Item might be to transform a field from a date value to months, days, or years instead.