Whose responsibility is it to maintain contact / visits?

[LongTermIssues]

Very willing to be told I’m being unreasonable here but AIBU in getting annoyed at having to always initiate contact with a parent (grandparent to my children). I think I’ve accepted that he’s not going to show interest in me but when it’s my children it breaks my heart. Like I can safely say he doesn’t know my children at all and therefore they don’t have a relationship with him.

so AIBU in getting annoyed at having to force myself and my children on my parent (grandparent to the kids)?

Sorry I should have clarified the voting situation :

YABU: you have the responsibility of seeing your parent and keeping them up to date with your children and building that relationship

YANBU: your parent should be putting in the effort. You’re right to be upset by their lack of effort.

Unfortunately your parents have the right to choose to see their grandchildren as little as they want. Keep inviting them to things, make them aware they're welcome to initiate an invite or enquire about meeting up, but if they choose not to, you can't force it.