It’s really not. Sealioning involves inserting oneself uninvited into a discussion, e.g. an anti-feminist showing up in a feminist forum to demand that participants defend feminism from junk challenges.

It’s convenient how some people have invented a word that allows them to avoid having to back up any claims they make…

“The Earth is flat.”
“What evidence do you have for that?”
“Sealioning!”

And your comment is classic avoidance and redirection.