I nursed my widowed MIL through cancer, while pregnant with my first baby. She died just before he was born. My own parents lived 20 miles away, with no car, and showed little interest in their first GC. I knew nothing about babies, and would have loved someone to be there, to help with a very difficult first year. Looking back, I suffered with post-natal depression, which wasn’t recognised then. Nowadays fathers are much more hands-on, and usually take parental leave, so new mothers don’t feel nearly as isolated and stressed as I did.
You will soon be able to see the new baby, but I hope that you will respect their rules, and not put any of them at risk.
You say that you are jealous of the other GPS. If you can’t be friendly with them it doesn’t bode well for your future relationship with your DIL. My new GS was born in Australia 6 weeks ago, and my planned visit was, of course, cancelled. They have kept in touch as much as possible with Messenger chats, and photos and videos. The other GP live just down the road. There is no social distancing in WA, as they are Covid-free, so they visit, and cuddle several times a week.
I consider them to be dear friends, not rivals, and always stay with them for part of my visits. Yes, I envy their proximity to the new baby, but jealousy has never been in my mind.
I hope that you can relax, and just look forward to the time when you can see your new GC without risking his health. New babies are pretty boring anyway! ?