Alright, I’ll try using a Samsung original charger and see if that works

I use a 25W iPhone charger. I also have a Samsung A16, and it charges with super fast charging using the same charger. But the Samsung A06 only charges at normal speed. I think there might be an issue with the A06 device.

My Samsung A06 doesn't support fast charging, no matter which charger I use. Also, it doesn’t charge at all while it's turned on — it only charges when the phone is switched off.