So I’ve been in both positions as I had kids later than many of my close friends
first, they are making mum friends to do buggy walks and midweek sensory play classes with. You kind of need to do the same now to do stuff that you might like - evening theatre, galleries, cool inner city wine tasting etc. lots of lovely single women in their 30s and 40s would love a friend for this stuff.
Assuming they have partners, then I’d suggest weekend brunches over evenings. The kids dad can hopefully cope. But don’t assume their marriages are fair or happy just because they have a dad at home.
if they are single parents or solo parenting, babysitters are so expensive it triples the cost of a night out (I spend £300 recently all in on attending a friends bday dinner, babysitter and taxis would have been £120 food and drinks and a night bus if I was child free)
young kids wake up so early. To get ready and go out after their bed time, and then travel into town and travel back when you’re going to be woken up at 6am being needed means if they head out far away they’ll need to head back. I can sympathize with ‘please come to mine’ as they are literally on duty till about 8.30pm but you’re in their minds free from 5.30-6pm and sitting on a tube seems more relaxing to them than doing dinner bath and bedtime . If you don’t want to do this travel maybe you go back to Covid times and just do a wine on zoom from 9-10pm for a catch up?
they are probably exhausted from the mental load there is so much to think about all the time with young kids nd their algorithms will only advertise kids stuff not fun stuff with friends.
however if they are really good friends I would send something like :
ladies I would love us to have some really good quality time together. These are some ideas, could you say if you’d like to do any (create a poll) and if we all want to then I’ll send out dates
then make some suggestions that can work for you.
as a single mum, if a friend is willing to come and hang out with me and child or come to me when he is asleep I am so so grateful and I will owe her one in the next season of life we’re in.