If the Russians have already developed and produced a functioning, export-ready APS, why don't we see it anywhere? If Russian commanders knew they were heading into insurgent country, and waiting for Arena-M in 2025(?) meant ordering crews to weld cuck cages to turret roofs, why not lobby to get it installed on every frontline tank beforehand? Any quartermaster can see that even if ~250 of Russia's almost 900 tank losses could've been averted, the system would basically pay for itself.
Manufacturer's website: https://www.kbm.ru/en/production/saz/368.html