Why aren’t there more EV route planning apps?

In 2022 there’s still no decent mobile EV route planning functionality (phone based, not in-car) — not from Apple, Google, Tesla, etc. or any of the other big players.

Best I’ve seen so far is a app called PlugShare.

My use case: I’d like to plan a Thanksgiving road trip. I’d like to play with various permutations of charging stops to evaluate the various factors: time/“fun” (stuff to eat/do at each stop), etc, especially with the proliferation of new supercharger sites in the last few years.

I’d like to do this in the warmth of my home a few days in advance, not “on the fly” in the car.

Surely my scenario is not that unusual?

Can someone ELI5 why this has been totally neglected?