I’m a new grandma to an almost a 1 yr old, 1st grandchild. I get where you’re coming from, I have 2 adult sons, one which lives locally & one in Canada (they are expecting a child next year), my guess is that most daughters will have time for their own families and not so much for the male partners family, it shouldn’t be like this, you can get a sense of losing your sons like I have felt, therefore grandchildren too. I have grappled with sense of missing out, as it is I do have my grandson one day a week & occasionally on a weekend if his parents have arranged something. I don’t get much more than this with family times, though I am very grateful to get what I have.
Social media doesn’t help, as you say you see via what’s app the ‘other’ grandparent/s in the photo. You must be wondering when your time will come.
Facebook & instagram is the same though lately I don’t see much of the other. If you feel you can talk to your son about it, please do try. I have a good relationship with my local son, but still couldn’t pluck up a conversation with him how I felt. I could see he was under so much pressure being a 1st time new parent, and working & stuff at home.
Beware not to upset the apple cart though. Good luck & hope things turn around for you.. 🤞