Watch not getting consistent notifications

It has been ongoing for years and several models of watch (beginning with Series 4 and now Series 7) and IPhone XS Max, 11Pro Max and now 13Pro Max. Throughout the years phones and watches have been unpaired and re paired. IPhone set up as new many many times. There have been several replacement of devices. Still IMessage, SMS, and Apple mail notifications do not constantly come to the watch. Yet, if the watch is off the wrist the phone receives and alerts those same notifications come through consistently. If I’m wearing Air Pods and the watch, notifications are consistently heard. ALSO, third party apps such as WhatsApp and Telegram notifications consistently come through the watch. Yet Apple Support only replays the same solutions that have not worked. On my most recent contact I asked to speak to someone other than the senior advisor and I was informed that they were the highest point of contact. I’m certainly not satisfied after many years of frustration