Hide projects on customer portal that have no request types

There are several projects in our JSD instance with no request types, we DO NOT want the customer to be able to submit any new tickets. We do, however, want them to be able to view tickets that were previously created in that project.

The answer that I've found before is to just remove all customers from the project and then lock the project down, but then our customers wouldn't be able to view their current tickets, and agents wouldn't be able to create new tickets and assign them to customers.

I think a good solution would be to HIDE the project button/card on the customer portal if the project has no request types visible on the portal. That way we have the flexibility to hide if we need to or to add in new types and make it visible again. THANKS!

*Edit: forgot to mention, right now it's frustrating from a customer perspective because they try to click on these 'empty' projects and instead, get an empty drop-down with no options. So from a UX perspective hiding the project card altogether would be ideal.