Note: this is not an animation error she lost her tooth but she's kinda ugly

You mean he, not she.

No, Bluey’s a girl!

No, he's a boy! Where did you hear that from?!

The Bluey episode “double babysitter”, go watch it

First of all, that episode sucks, because of the title. Bluey and Bingo aren't even babies. Bluey is a kid, and Bingo is a toddler.
Second, Rad and Frisky are Bluey and Bingo's uncle and aunt.
And third, the MAIN REASON and #1 worst thing about it is that stupid-ass scene where Bluey actually misgendered HIMSELF. I hope the episode gets deleted. Or at least the title gets altered and that annoying scene involving Bluey yelling at his uncle like a spoiled brat gets deleted.