That's not first stage armor, roflmao. These are molotov guards. Most of the bottles will bounce off this and break open elsewhere and keep the upper crew hatch clear of fire.
a few example:
source: https://www.oryxspioenkop.com/2022/02/attack-on-europe-docum... (you can find way more cope cages when opening the pictures for damaged, captured and abandoned russian tanks in the list).