These cheap keyboards from China, via online platforms (like Shopee) have a weird layout. There is no #AltGr / #RAlt. They replaced it with the backlight switch.

Out of curiosity, I bought one. At least now I know (and I need to acquire a regular keyboard fast).

The keyboard that I am looking for is one that can be customized, this way I can switch between #Colemak and #QWERTY layouts, with AltGr / RAlt key. I don't care about the extra functions / keys (unless I can program those too). But this type of keyboards is expensive and not easy to find.