Unfortunately, the courts can stipulate when you must make your children available for access, but he cannot be compelled to turn up. Legally, he can pick and choose !
I know it’s annoying, I have much the same issue. However, you have years of co-parenting to get through. You need to decide on a strategy that is best for your children, causes you the least stress – because constant disagreement can make you bitter, and is easiest to live with.
I bargained my way through, he wants me to flex so I have extra days at Xmas or my preference at half term in return.
Choose your battles, it will save you a lot of stress & grey hairs.🍷