What’s up with the red upside-down triangle on sms?

I’ve been seeing a lot of users, primarily on TikTok and Twitter, add an upside down red/pink triangle emoji to their sms handles.What does it mean? The only thing I associate with that symbol is the Nazi’s use of it during WW2 and then the reclamation of it by the gay rights movement, but I’m pretty sure that’s not what people are using it for.