I have enabled Epic Account linking on GeForce NOW, but I am still asked to log in to Epic Games to play some games.

Steam, Epic Games Store and Ubisoft Account Linking Now Possible on GeForce NOW

You can now link your Ubisoft account with GeForce Now

Latest GeForce NOW Upgrade Rolling Out With Ubisoft Connect Account Linking and Improved PC Gaming on Mac

GeForce Now RTX 3080 tier hands-on - Reviewed

NVIDIA Partners With Electronic Arts to Bring Hit Games to GeForce NOW

GeForce Now: Review, games list, price, supported hardware and more - CNET

Alan Wake 2 is available to play on GFN via Epic Games! (Please Read) : r/ GeForceNOW

How to Build Your Game Library in the Cloud

How do I set up an Epic Games account and add games to my library to use with GeForce NOW?

How to play Fortnite on a Chromebook - Android Authority

Can I continue to play supported GeForce NOW games that have been delisted from a digital store, like Rocket League on Steam?

Nvidia's GeForce Now loses 2K games, gains Epic support

iPhone And iPad Gamers Can Now Play Fortnite With Touch Via GeForce NOW

Core on GeForce NOW! – Core Help Center