Accessibility Labels for Required Fields

I am attempting to add necessary accessibility label functionality to meet legal ADA compliance for web forms on our website, which is currently missing from the form fields.

I was able to add a hook to my functions.php file for the add_input_html function to add "aria-required=true" and "aria-invalid=false" (by-default setting) to required form fields, but am having difficulty dynamically changing aria-invalid to "true" when the error is appended below the field, and resetting back to false when the error is corrected and removed.

Thank you so much for your help.