Issue is still the same in Feb 2025. Tried using different keyboard layouts to no avail. Did a bit more research and found a few topics on it...
Also found this in the technical support for Ultima - I can't type in the game so I can't log in, what should I do?
Change your keyboard language to United States, if you have enabled the IME in the launcher options, turn it off.
Might be a different issue, but that is not an option in Destiny to test anyway. Unless we can find a way to change that setting outside the options?
Can still play just can't create rooms on Steam Deck. Wouldn't if some form of copy/paste is a way around it?
Feels fixable but for now I'm going back to Ultima.