Another code recollection for Nintendo Switch, safe code is R11 L1 R9 L18 will it open

The code you provided seems to refer to a specific game or console feature that might require context to determine if it will unlock something (e.g., a secret area, a cheat, etc.). Nintendo Switch codes generally follow certain formats but can vary widely between different games. If you could specify which game you're referring to with that safe code (such as a particular title or context), I may be able to give you a better idea of whether it will work. Alternate codes can often be found in guides or communities dedicated to that specific game.