Im having a difficult time as well. Im a single mom by choice and everyone was so excited in the beginning but getting friends or cousins to visit is very difficult. I understand we all have our own things going on but still. It’s appreciated when they check in.
Is it possible they are to give you space to adjust? My friends kinda disappeared after I had my 3rd, and now that he's 4 mo., they are just now resurfacing. Babies have pretty weak immune systems until 3 mo, so my friends stayed away if they had even an inkling of a sniffle. My family lives on the opposite coast, so they all have different reasons for not visiting. maybe let your friends know you miss them and schedule a coffee date?
My biological father and step mom acted like they were over the moon excited for my son to be here, yet never sent a gift or a card, never congratulated us on his arrival, and never check in on him or us. Yet they still want us to refer to them as his grandparents. Grandparents are earned titles in my opinion. Not that they have to buy their way in, but they don't even make an effort.