That is false.

This integration didn’t exist when the EV versions were just electrified versions of ICE cars.

This changed with the upcoming of car by traditional automakers that were designed to be an BEV first. I’ve used the route planning in a Kia EV as well as a VW EV without any issues. You can plan your route with charging points, select the desired remaining capacity, select the kind of charging you want, etc. AFAIK Porsche offers the same features too

My Renault Megane E-tech will tell me the battery % when I reach my destination, and will ask me to add a charging stop on the way if I won't make it. My previous BMW i3 did the same.

That seems weird.

Edit: Just looked up Porsche and they have it too. They call it "Intelligent range optimiser". Can't be asked to check more brands.