Make an element that is hidden that has all possible values of classes you can use. Or use normal css for that one part of your app if that isn't possible. Lots of ways you can handle this without thinking the framework doesn't work.

Ninja:

https://tailwindcss.com/docs/content-configuration#safelisting-classes

Tailwind actually has this use case covered already. Use the safe list functionality to always include the classes you need.