We paid for everything during college but once they graduated we paid nothing. Both sons stayed here for a while and paid a "household contribution". I think it was 30% of take home pay. This covered living at home, groceries etc, but not car expenses or health insurance or phone or anything personal.
One son had a nice salaried job and paid us quite a lot. The other son is self employed with a widely variable income, so that's why we did it by a percentage of income.
They are both out on their own for many years by now. I like to think we helped them learn to save and live within a budget.
The younger son went away to college for one semester and decided to transfer. He skipped one semester and came home and worked. That's when we started the percentage of income contribution method. He went from full time student to working and living at home and paying into the household. He was only 19 so we felt this was appropriate. After skipping one semester he went to a local state university and finished in 8 semesters total. We paid everything until he finished college.
When he graduated and still lived with us he paid us a percentage again to live here. It allowed him to build up his business and budget and save.
As for the OP and what he should do.......
Establish a written agreement as to what will happen going forward. Do you want a monthly contribution? Are you willing to have her live at home if things change? If the car is hers, then she should pay for the repair. If it's your car, pay for the repair and it's the last time. Sign the car over to her and be done. Stop paying for her health insurance and medical bills. When our son was self supporting but still on our health plan he reimbursed us for the cost every month. Same for his car insurance.
Set up some boundaries so that you and she both know who pays for what. Write it down and both keep copies. If she doesn't like the arrangement, she is free to move out. Or go back to college.
At 22 and working she needs to be financially separate from you. Her bills are hers. She should be paying to live somewhere, if it's at home with you then she needs to feel the impact of that (even if you give her a really good deal because she's your kid
)