Allow File Name Validation in Trigger Form.

Essentially, would be great to somehow include with use as a Form Variable, to somehow include the filename in a Collection variable that could then be used in Form Validation or Submittal Validation Rules. We still have issues with files included as characters that are restrictive for uploading into say SharePoint Online, like \" # % * : < > ? / \\ |.

I realize this can be done in the workflow, however the challenge is we need to stop them at the form level for this use case and prevent unnecessary rework before a form can be submitted.