Do friendships just fucking suck after kids?

My friends were so supportive throughout my pregnancy and the first month or so ppd, but now 10 months in, they’re MIA. I totally get that we are in different walks of life now since they don’t have kids, but it just stings that they are making plans, going on trips and doing things without me. Stuff I could absolutely go to or would want to do, but they just assume I won’t go or can’t go so they don’t reach out. And I get it’s a two way street, but I do check in on them when I can. Usually with little to no response and they never ask how I am doing or how the baby is. I guess I just thought it would be different.