I would assume it’s trolling/not serious rather than a genuine affiliation with the alt right - nothing seems to be serious with her - but obviously would keep an eye out for this with her in future.
Doja Cat is a good example of being a bit of a Gen Z troll, but one where there’s evidence to suggest she’s either genuinely sympathetic to the alt right or at the very least she spends a lot of time in dodgy internet circles. (Which is really annoying because I really like some of her songs and enjoyed her irreverence up until this whole thing came up with her in Tinychat video rooms with white supremacists - despite being half black - and an old unreleased song of hers coming to light called Dindu Nuffin, which is an alt right reference to POC being accused of crimes claiming they didn’t do it. On a different problematic note, Doctor Luke produced some of her songs under a pseudonym as well but unclear that she was aware of it.)