Yeah I'm usually pro-Spartacus on these sort of threads, but on this I don't really see the issue.
The ad doesn't focus on or prioritise trans over biologically female mothers. It's just in the mix. Which unless you are massively anti-trans on principle which would make you bigoted as fuck is pretty uncontroversial.
Some people are trans. Some of those people have kids. This is not news or outrage-worthy.