Missing mission assets

missing radio tower to access the side mission ‘Resistance radio maintenance’ at the tower at ~-3243.280, 761.027

even after reloading my game the tower still doesn’t appear

It’s a known issue, there already are numerous reports.
There seems to be a difference in the game world between the devs version and our version.

We’re waiting for about a year for a revamp of the mountain region, which seems to be prepared, but not finished on our side, yet… At least the structures that should be there are still missing.

You can finish the mission by staarting the generator and then firing a rocket at the button. It worked for me on XBoxSX.