They really need to get this infrastructure bill passed to get more EV charging sites built out. As noted, EA and Tesla are the 2 brands I know of that have sites that will allow you to travel across the country with fast chargers at the moment. EVGO and ChargePoint has some charging stations in cities but as noted, they are 50 kWh sites or less. and they don't have more than 1 or 2 per site in my area. Going up 17 to Sedona or Flagstaff from Phoenix, there is 1 site in between at Anthem with 4 units, since April, there have been 2 (both 350 kWh units) that are offline and the other 2 (150 kWh) units are not providing max power. I got up to 38 kw max on one and the other 35. The most I have seen anyone reported on PlugShare is 79 kw last week. This sort of thing puts a damper on any long distance travel up this route, since you will need that charge to go over the mountain. Coming down from Sedona (lots of Tesla sites, a few level 2 sites and level1 at hotels) or Flagstaff (EA site here), you will be fine as you are coming down the mountain and a full charge will allow you to bypass Anthem and get to an EA site in the PHX metro area.
Going out to San Diego on 8, the station at El Centro also has some issues and yep, you guessed it, only station before going up that mountain before getting to El Cajon, if you suffer from lead foot syndrome and need another charge. What's surprising is that no one thought about building a canopy to block the sun at these stations. Seems like a good opportunity to add one and also place some solar panels on top to provide lighting at night.