A new release of Weaver Xtreme Plus in the works – I hope for a May release.
One new feature is integration of the Weaver Xtreme Plus added Google fonts.
It the current version, you have to specifically add supported Plus Google fonts from the Legacy Options interface. Those you pick are then included on the Font selection menus in the Customizer, and the added plus fonts don’t auto update the Customizer display. Admittedly not the best.
The newest version of Weaver Xtreme Plus will integrate with the Customizer font selector, and update the display.
So, the current fonts supported by Weaver Xtreme and Xtreme Plus are displayed on this example page: