Align customizable or add option

Right now there is hardcoded static variable:
"PREFIX_ALLOW_LIST"
Source: https://git.drupalcode.org/project/tailwindcss_utility/-/blob/2.0.x/src/...

There is two more thinks in same approach needed but not even as static variable:
Prefix:
https://tailwindcss.com/docs/configuration#prefix
Source: https://git.drupalcode.org/project/tailwindcss_utility/-/blob/2.0.x/src/...

Separator:
https://tailwindcss.com/docs/configuration#separator
Source: https://git.drupalcode.org/project/tailwindcss_utility/-/blob/2.0.x/src/...

All of them should be read from 2 sources:
- setting form in module that will merge with default or override? (great to have prefix change and not collide with other modules)
- theme settings (maybe, if not then consider updating documentations that don't scan this part)

Proposition to add in readme "what is for" and what not: "Use approach of having this module as additional part of dynamic entries that occur from client side".

Are they saved as file and compliance with Options API and Git approach?

Thanks :)