I’d put it back on her to elaborate. “What do you mean by that?” if she says she never gets to spend time or hold or whatever, just list your examples. if she’s being passive aggressive most of the time what I’ve noticed when you call them out they just back down and change the subject.
My response would be your got the lucky job as the grandparent get to all the playtime no need to build the muscles 💪
Good job he’s not a baby anymore and doesn’t like to be held much now