I found this post from 2016:
“At Microsoft Ignite 2016, in Atlanta, we proudly announced the availability of the new “PnP Templates Gallery” portal, which is available at the following URL: https://templates-gallery.sharepointpnp.com.”
“The basic idea around this new portal, is to have a public and shared repository for PnP provisioning templates, which anybody can download and use for free. Moreover, we hope that many community members will like to share their own templates with the community. In the following figure, you can see the home page of the PnP Templates Gallery.”
Sooo why is it a dead link now? Did it get moved? Is Microsoft moving away from PnP Templates?