Similarly, Korean transliterations of L and R use the same jamo, ᄅ. In actual use the character is pronounced like either English letter depending on where in the word it is.

https://en.wikipedia.org/wiki/Rieul_(hangul)

That’s Japanese though, this is talking about Chinese. There are a lot of languages and dialects lumped under “Chinese” though. Iirc Mandarin has both an R and an L sound, however I think Cantonese doesn’t have an “R” (can’t remember, I studied some Mandarin when I was a teenager and I think I remember being told that Cantonese didn’t have an “R”, but it’s been a long time). Not sure about any other languages/dialects.