Have you checked out your notification settings?
Yes, but I didn´t find any setting related to dotch led notification or something similar
I checked out the user manual and tried searching around for it. I actually haven’t been able to find any mention of a user customizable notification ring. The TCL 20 pros do a edge screen lightup, so I actually don’t know. You may need to reach out to smartphone forums on what’s happening or contact TCL for hardware assistance.
If it’s been less than a year since you got it, you could try a warranty repair through Koodo.
I has been less than 15 days since I bought it, trought Ebay. The seller tells me that that's something normal, but of course I'm going to return it, or change for a new one. Luckily I paid via PayPal so I think I would have no problems for my money back.