You're in a car. There's probably a charging port there. Sucks if you don't have a phone, but it sucked before when you didn't have change.
Parking has always been a privilege not a right, and if you're not prepared you're going to get a ticket.
I get that it's annoying but if my phone broke and I suddenly had to pay for parking with coins, I don't know what I'd do either. Everything is cashless now, where would I get coins from?
Just pick a random small instance. The catch is that larger instances that don't block spam instances are probably going to have their own spam problem and get blocked by other networks.
I had a quick look and https://lemmy.sdf.org/ doesn't seem to block or be blocked by anyone, according to this list: https://github.com/maltfield/awesome-lemmy-instances?tab=readme-ov-file