Adding Adobe Font to Brands in Express

Hey all, I have a font in Adobe that I have activated (Rustica) and can use in making my content, but it won't let me add it as the default font in "Brands." It's only given me the option to choose among a few other Adobe Fonts (Futura, Raleway, Courier, etc.) or add a seperate font file. I've even tried deactivating all the other fonts I use, with no luck. I'm using macOS Monteray. If anyone has any advice/info on this, it would be greatly appreciated. 

Thanks!

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