Does he ask to see her? Is there a visitation schedule?

It's conflicting, from how his absenteeism sounds. If he's only seeing her, randomly that could be as damaging as not at all.

It's one thing if he's taking all available options to see her. It's another if he isn't. It's one thing if you, as the custodial parent are making every attempt to foster their relationship, another if you aren't.