It is easy to install Premium Patreon exclusive content on the Forge.
What you have to do
Hit the “Unlock” Button
Subscribe to the appropriate tier.
All tiers do not unlock the content. Be aware that some content may be unlocked if you sub at higher tiers, only.
After doing so, make sure to have your Forge account linked with Patreon.
You can link your patreon over at “My Account” at the bottom, under account information:
Now, the content should be unlocked instantly. You can now go over to “The Bazaar” and install it. If not, wait up to 5 minutes and make sure to refresh the page.