"made Bowsette non-canon"..? But she was never canon to begin with..? That is like saying that a fandom-made ship was made non-canon when a character hooks up with someone else in canon.

Eh, Nintendo putting a hard kibosh on the concept isn't going to kill Bowsette. Popular memes don't die easy.

What might kill Bowsette is the people that shove in gender/identity politics into the character, like the people who say Bowsette is trans or that Nintendo is misogynist for having a sexy Bowser in their character roster.