My grandparents are the same way (I live with them). I've been 16 since mid-April, and I still don't have a phone. I've had a phone before (on multiple occasions), but when I first had one, I had a screen time limit of 15 minutes a day. And half the time, I wasn't even allowed to be on my phone because i was being a "bad kid". I didn't have access to the internet, and if I wanted to download an app, it had to be approved by my grandmother. I didn't have access to Youtube until about two years later, and it wasn't even normal youtube- it was youtube kids.
Sorry for the long explinations, but I just want you to know that I'm in the same boat, man. It sucks.