I would like to suggest the possibility to add track armour to some italian tanks and tank destroyers, as previously done by onemax9000 in the old forum (Add-on armour for Italian tanks - Passed for Consideration - War Thunder - Official Forum).
During the war in nothern Africa, the overall obsolete italian armoured units were forced to try and improve their survivability by adding spare tracks (and sandbags, but even rocks!) on their tanks, in particular on the front of the hull and casamate, in a desperate attempt to reduce the effect of allied 57 and 75 mm guns at long distance.
No vehicle, to my knowledge, has the option to use sandbags and I can see the reasons behind the decision, I am not suggesting that. Track armour, instead, is implemented on a variety of ww2 vehicles, whether as a researchable module or stock.
Italian tanks and tank destroyes are known to be a little fragile at their current level, as was historically, and this addition would provide the italian vehicles with a little benefit in armour at the expense of a little mobility, already poor, giving the players the possibility to adapt and change their playstyle, this will surely not change the overall capabilities of their vehicles; for what I can say we are talking about 20 mm of maximum track armour (less efficient than RHA), nothing extraordinary.
Since we have already in-game some vehicles that probably entered in service exclusively with the German Army (75/46 M43, for example), I considered photos of captured italian vehicles in German hans too.
I found some photo, but I will gladly add any additional one linked on the comments below. Many thanks to ImportantSimone5 for the many additional and important images.
Two L6/40 in German Service with side track armour and probable frontal hull (we can barely see the silhouette of the track in the snow, but unsure).
Italian L6/40 with limited additional tracks on the front of the hull.
Semovente L40 da 47/32
Semovente da 47/32s with tracks added on the front hull. Probable German Service in the Balcans.
M13/40 & M14/41
Two photos of the same M tank (some sources say M40, some M41, if someone can tell the difference please help) in Africa, with extensive track armour all around the turret, on the frontal casemate, and over the transmission.
M13/40 or M14/41 with limited track armourd in turret and over the transmission.
Knocked-out M14/41 in nothern Africa with limited track armour over the transmission.
Carro Comando Semoventi M42 and one M13/40 or M14/41 with frontal track armour. (provided by ImportantSimone5
M15/42 - All from probable German service
Two photos of a M15/42 in german service with rather limited side track armour.
A bunch of pictures of a group of M15/42s captured by yoguslavian partisans (star painted over the cross in the turret in the tank behind the pylon), with track armour around the turrent and at the side of the casemate, with minor differences.
Maybe the same occcasion as above but with extensive spare tracks on the frontal hull, casemate, side casemate and turret.
A badly damaged/destroyed M15/42 with half the barrel torn away but limited frontal hull and casemate track armour and track lins on the cheeks of the turret.
Semovente 75/18 M40/M41/M42
Spare tracks on the frontal casamate (maybe a buried vehicle).
75/18 completely covered in spare tracks, sandbags, fuel cans and junk.
Sandbags with spare tracks on the transmission.
Two photos of the same group, with spare tracks on the frontal casemate and on the transmission.
A Carro Comando M40 in foreground, with tracks on the transmission, followed by some Semoventi with tracks on the hull.
A Semovente 75/18 M42 in german service with track armour on the front and the side of the casemate.
Semovente 75/34 M42
A disabled Semovente 75/34 in german service, track only on the frontal hull.
Atlante Mondiale dei Mezzi Corazzati, vol.2, Nicola Pignato, Ermanno Albertelli Editore.
I mezzi blindo-Corazzati italiani 1923-1943, Nicola Pignato, Storia Militare.
Carri Armati nel Deserto, Valerio Naglieri, Ermanno Albertelli Editore.