You need to clean the USB port on your phone thoroughly with a toothpick

Ah this is interesting, I have a ugreen 65w charger that seems to do sometimes this with my pixel 7 pro. It didn’t always happen, but I couldn’t figure out what would trigger it and how to resolve it again once it started.

I ended up using that charger for other uses in the end and got an Anker one for my phone charging.

It sounds like the Ugreen charger is unable to properly negotiate a USB PD profile for whatever reason, so it just endlessly restarts.

Could be a faulty unit, or just a faulty design overall.