Tasha's already largely covers that stuff, I'm not sure any more Patron stuff is needed, maybe a side bar with Patron suggestions. Patron aren't even AL legal.
Anyways reread the Adventures in Eberron section, it's mostly organizations, I don't think you need 80 pages to cover that for FR. Maybe 20 pages is fine, there likely isn't room for more, Faerun alone has alot more countries and independent city states then Eberron, they will want some space for player options and monsters as well.
For major nations alone there are Chessenta, Mulhorand, Unther, Tymanther, Calimshan, Tethyr, Amn, Cormyr, Sembia, Impiltur, Dambrath, Damara, Halruaa, Lantan, Nimbral, Thay, Rashemen, Narfell, Aglaron, Thesk, Durpur, Luran, The Great Rift, Najara, Samarache, Chult, Tashelar, Turmish, Nathlan, Deep Imaskar, Evermeet, Everseska, Sossal, Murghom, Moonshaes, Semphar. That 36 nations alone. There is a couple of names I forgot like Paladin Nation and the name of the nation with Tantras and Ravensbluff.
I didn't even touch on small kingdoms like Hartvale or independent city states like Westgate. Or nations under the water. Or space for new stiff like city of Lorendrow and the city of Aevendrow.