No Ultra Graphics Mode with Radeon RX 5500 XT GPU

Similar to the RX 6900xt - no UltraHD mode thread.
I have the subject GPU and cannot get Ultra mode in the game settings. 1080p on my 4K TV looks good but from what I read online, Ultra looks even better. What has to happen to get the RX 5500 XT card added to Zwift? Thanks!