InvalidRequest when adding "Private Link Service" as a "Managed Private Endpoint"

This is extremely frustrating.  Here is the support response:

Hello Josh,

I hope you are having an amazing day.

We have shared the issue with all collected details in our SME channel. They responded that currently, private endpoints targeting Private Link Service are not supported. Additionally, we do not support creating managed private endpoints with FQDNs at this time and there is no ETA. The product team will add this limitation to public documents once they have an ETA.

I am pleased to inform you that there is no issue from your side; however, the actual feature is not supported currently. We have already created an incident with the product team, and they are working on updating the feature.

I apologize for any inconvenience this may cause. Rest assured, you will be able to access this feature soon.

Please feel free to reach out to me if you have any questions, concerns, or additional information that you would like to share. I'll be more than happy to assist you.

Thank you for your understanding.