I often wonder how Mayday went from this to being the boomer girl equivalent of spider-man that only appears in Spider-Events now. Is it because the sliding timeline kind of fucked her world ?
A lot of people view her as Tom DeFalco's baby. DeFalco based Peter and Mayday's relationship on the relationship between his brother and his brother's daughter.
(There's also Marvel's continued insistence on making Peter seem "YOUNG". That makes a teenage daughter the kind of character they don't want to promote even if she is from an alternate universe.)