Hi Drew88Z,
It looks like you have a 7 or 8-speed road derailleur (meaning, it works with either 7 or 8 cogs in the cassette). Any 7/8 speed Shimano road derailleur should work as a replacement.
Alternatively, you could mount up a Shimano MTM derailleur, like the Acera M360. https://www.amazon.com/Shimano-Acera-Mountain-Bike-Derailleur/dp/B07CRTCPXT
The main difference between the two is that the cable tension on a road derailleur is adjusted on the derailleur body, and with the MTB version it’s adjusted at the shift lever. To run a shifter designed for use with a road shifter with an MTB derailleur you would need to install an in-line cable tension adjuster — or an mtb shift lever. This is an in-line cable tension adjuster: https://www.amazon.com/Jagwire-cable-adjuster-Mini-In-Line/dp/B0029LF1GQ
I used Amazon links because I live in the EU and figured you wouldn’t want a bunch of info in Italian, nor to wait for my VPN.
Please ping for clarification, or to let everyone know how the swap went.
Cheers!
-Gerow