My mother put my phone on the new screen time feature for iPhone. I'm 21?

So my mother tends to be a bit of a control freak at times since I still live at home(I pay rent monthly btw, not for free). So whenever I want to relax, I play games on my phone because I have no other electronic device to play it on. I'm also in college and work 30 hours a week, so I can't really do much outside of all that. So, while I was waiting to clock in one day, my apps locked out. Its all password protected and I can't do anything about it. She won't let me get a plan of my own(Believe me I've asked many times) because I'm still "under her roof" and I'm finding myself stressing out more than usual. Is THERE ANYONE THAT COULD Help ME TAKE THIS OFF?

Added (1). I pay for my part of the plan.

Added (2). As well as I bought the phone my 18th birthday. Believe me, I'm doing my time.

Who pays for that expensive phone + plan?

She might not have done it. I don't have a child account, and Screen Time is running on my iPhone now. I think it was automatic with the last update. Go to Settings>Screen Time>Turn Off Screen Time. Enter your phone's passcode if it asks you for a code. If that doesn't work, just message your mom and ask her to shut it off for you.

Nnaybe you should nnove out and then you'd have nnore control over stuff like that

Tell her, "look, I'm doing everything I'm supposed to be doing. I'm going to school, I'm working, I'm paying rent, if I don't deserve the right to choose how much screen time I use, then what do I have to do, because I feel like 'what is the reward for working hard to do things the way you want, if you still treat me like a child?"