well out of all those readings you have there the highest of 58C doesnt seem to be too excessive. But that is only after run for 30 mins. Try running the machine for a bit longer...
lets say 1hr or let it run for half a day and then take readings and see. You'll want to catch it after it has been ran normally and is in the excessive heat stage.

If you are getting overheat errors that is when you want to take the readings... when it is in that state.
The readings that will most likely trigger an overheat code would be on the hydraulic motor itself or back on the control panel where the temp sensors are at.

If you are just concerned because the truck is building up heat , well most electric trucks will get hot after being ran for a long period of time, usually at the end of the battery charge when the battery is in its low charge state is when the heat generated is at its highest because of the high amp draw / low voltage state.

Now if you start seeing temp readings upward towards 70C anywhere that would be excessive i would think.