*[RESOLVED] Turns out the server I was on uses a mod that has functional viewports on the BTR. Viewports are not part of the vanilla base game.*
Game Version number: 1.1.0.42
Modded?: No
Issue Description: All BTR-70 viewports do not work.
No action menu exists on any of the viewports in the vehicle; not in the driver seat, not in the commander seat, and not from any of the passenger seats and their viewports on the sides of the vehicle. Noticed issue while working on a copy of the vehicle prefab in Reforger Tools. Tested vehicle in base game with no mods, issue still persists. I do remember the vehicle having working viewports just a few weeks ago.
No action icons on the viewports for driver:
Working lever action icon for driver shield:
Existence of the working viewports in April 2024: