Depends who you ask, really. There's also a weird heirarchy to how offensive the words are, but people have different ideas about when it starts to be tame and non-offensive, so... Go with whatever you see fit, I guess. Slurs, on the other hand, you might wanna consider putting the tag on and a separate warning about.
Personally, I don't think profanity's all that bad tbh it's more about the intent behind it. If it's supposed to be offensive to a character on the receiving end, that might impact the reader more compared to something that's supposed to be generally nice and casual. So.. nice cursing is okay, but mean cursing is bad imo.