Look into using FormKit

[Dutchman97]

FormKit is a framework for Vue3 for generating forms and validating form inputs among others. It's currently in beta, but once it properly releases it could be worth looking into replacing the custom form solution

Integrating with Bootstrap might be an issue however as it seems to use a single component for every kind of input, so adding Bootstrap CSS classes will be non-trivial, but skimming the docs it seems the framework has some stuff for this at least