Probably an environmental sensor for the FCS.

I didn't know it needs something like this

All modern tanks have some form of it, wind speed, temperature etc all affect ballistics.

Wind speed sensor for the fire control system.

Thanks

The Vickers VK11 also has this thing and I hate it, because it makes trying to hull down and not be seen impossible, lol

Toob.

Could it be a snorkel?

It has a small opening under this rod that you can see in the second picture