most happy and healthy kids have a unique desire to learn and trying to suppress that is unhealthy
things like screen time, finish your plate, etc
screen time is just a limit on time to learn if the kid is using it for the right purposes which you should teach them to
“finish your plate” I was never told that as a kid and I devour anything that is given to me
Teenage years are known for being rebellious and older adults generally correctly remember themselves as being wreckless and rebellious at that age. It is a part of being human.
That said, if you want to be treated as wiser and “older” than you are, I would have to ask what is it about you that make people think you’re young? I’ve had several cases in my teenage and early adult life where people assumed that I was far older than I was, mostly in part due to how mature I acted in given situations.
What is it about how you conduct yourself on the Internet that makes people think you’re young and immature? You could be acting your age, but it sounds like you’re frustrated with people treating you like you are at your age’s maturity level.