I installed via EmuDeck.

It is in the same dir as Metroid Prime and Xenoblade, which are showing up when I launch yuzu.

The only way I can launch Super Mario RPG is to add it as its own game entry in the Steam Library through Steam ROM Manager in EmuDeck, then launch it that way. However I don’t know how to bring up a menu to edit settings to try and get better performance when doing it this way, so want it to show up in a general yuzu launch in a list with the others. Why isn’t it showing?

If anyone is curious - SMRPG runs well on Deck. The early scenes where you see Bowser’s Castle are low fps, but there is a Digital Foundry video that shows this same thing happening on the Switch. Usage is like 55% tops on GPU and CPU usage is quite low, so this is an emulation issue not a “Deck not powerful enough” issue. Battles are 60fps, if an area is large you will be around 50fps probably, but I saw this happening in the DF video on official hardware as well. At least here you can get the res higher.