My girl does most of these things although does giggle and respond to her name . I would try not to look too much into things as this stage and enjoy you baby
My nearly 5mo has very limited eye contact when being held on my lap, it does have me worried sometimes too as I remember my first baby being much much more engaging at this age. He doesn’t try to get my attention or seem to care if I’m there or not. It could be a boy thing as my first is a girl but who knows! I feel like I could be expecting too much for his age but I would also be interested to see if anyone else’s baby doesn’t give great eye contact all the time. I wouldn’t worry whatsoever about any of the other things, they sound like normal baby things. I definitely remember my first moving and squirming a lot and she rarely giggled too she was more serious although more engaging! It’s hard not to compare isn’t it and I guess with your older child you are hyper sensitive to it. Xx
My Little girl flaps her arms regularly. And goes from content to screaming in seconds. If that helps with you feeling like your LO is like other babies.... My little boy had most of the above, he never sat still, was always rocking, throwing himself backwards ect. But he would have eye contact. He isn't autistic but I'd definitely say he has OCD tendencies! I wouldn't worry too much with milstones. She still has time to roll and sit up!