Hi OP
I am in the same position at a small state primary school.
People assume we are well off because my husband has a top job.
There are people who are busy working and they seem lovely but obviously these parents are busy working.
The pta crowd ( who seem to have rich or well off husbands who work) so mostly sahm but bizarrely all though the stay are home mums are not employed with paid jobs they then put down the unemployed or working poor parents, or have even said bordering on racist comments, both of which my husband and I can't stand so although we were kind of invited to fit in there we objected to how they spoke about other parents and made that clear.
In retribution we have been banished or are just ignored. So social events go on we are not invited but nor are the poorer parents.
But then the parents who are struggling don't want to really engage either.
I have one friend who I see at pick up and drop off there who is lovely.
That is it.
It is very strange and a bit unusual when no one says hello or people do one day and ignore other days.
It is quite sad to me that the children don't seem to mix.
We try our best and we do try donate more money to help low income families but do this with a low profile.
The school engages with the pta parents (and I can see why they have the time to contribute) but ignore others.
I am surprised how I just don't fit in and it has never happened before and it has actually been a good lesson as I try be as inclusive as I can.
I am surprised how not fitting in or being ignored actually hurts.
I actually wish I had never chosen the school.
I can't wait for secondary but don't want my children going to the same school as the children from the pta.
I was working and tried to be a sahm for a while but found the whole thing incredibly isolating and am surprised at how awful it makes me feel.
My kids are oblivious to it all.