You can withhold any of your offering to anything they do that you don't agree with, simply inform the church.
None of my offering goes to the national, for instance.
My mother and her widowed friends still go to this Presbyterian Church USA that I left. My mother knows that the pastor has abortion coverage because I told her. The other ladies don't even know about it. I informed people about it at a Stewardship meeting, but one man said, "What do you want us to do about it?"
The Pastor NEVER stood up in the pulpit and told everyone he has abortion coverage. When I asked him to exempt our church from this coverage, he was uncooperative.
IMO staying at this church was like being a member of the Democrat party. I searched my heart and couldn't be a member of a church that took members' offerings and paid for abortions with it.