Is it easier or harder to attract someone if you have kids?

It depends on the kid. A cute well behaved kid isn't bad. A mouthy little brat is a problem. Over the years, I dated several women with children. It was never a problem for me. When my wife and I got married she had a son from her first marriage, I looked at it as a package deal. I wouldn't pass on a woman who has a child unless it was a brat.

Much harder.
If you have children they'll always be your priority.
And you're asking your children for a lot of 'trust' in your choice of partner.

I know I wouldn't be interested

yeah i’d say it’s harder