Question about Ueli Express Playstation 2 auf HDMI Adapter

Unfortunately I don't know :( I'm sorry

Not only for ps2 games. It's a 480p adapter, so it's incompatible with ps1 games, but also some ps2 games that run in 240p (Ico, for example). I'd recommend using Hyperkin cables, which ensure full backwards compatibility, as they're the most affordable and effective solution. Or invest in an upscaler (which is expensive) or buy a crt TV (even more expensive).