Is it possible to set the Plesk default certificate as a Let's Encrypt wildcard cert which can also be used to preview URLs?

I can add a wildcard cert to a domain, but how do I get it to show up in the "Server Pool" under Tools & Settings > SSL/TLS Certificates?

I've looked through the psa database and file structure and I can't seem to figure out what makes a certificate part of the "Server Pool" vs belonging to a domain.

If I managed to get it to show up there could I set it as the default cert and therefore automatically make all my preview URLs secure?

This would make preview URLs REALLY useful for my...

Is it possible to set the Plesk default certificate as a Let's Encrypt wildcard cert which can also be used to preview URLs?