Validation for special characters in Check-In Topic Name (VBS)

I’m trying to add a validation to prevent users from entering special characters in the Check-In Topic Name during check-in creation. I checked the check-in creation/edit page in Visual Builder Studio (VBS) and switched to Advanced mode, but I don’t see any option to configure a validation rule on that field/page. Has anyone implemented this kind of validation for Check-Ins using VBS, or is it not supported for this page? If it’s not possible directly, are there any recommended workarounds to restrict special characters in the Topic Name?