I wouldn’t be surprised if the internals are identical to the Apple-branded chargers. It will be fine.

I got my SE2020 on release day (I preordered it to replace my 5s that I got back when it was the flagship phone) and have been using it daily since. I’m actually typing this comment on it.

It’s treated me well, and I have no current desire to replace it. The short battery life other people report hasn’t really affected me, and it’s been sufficient for my use. The phone still reports 90% battery health.

My last phone lasted me 6 years. I won’t even start to consider replacing this one for at least another year (making it 3) unless it outright dies on me.

When I get new gadgets, I like to get current gen products, but then I’ll eke every bit of life out of it that I can before replacing it.