It is called condenser cover -they are usually flexible covers of different styles and colors.
You don’t have to have a hard plastic.
Your condenser model is somewhere on the unit.
Your photo says PRQ condenser
Measure the size of your unit to make sure your cover will fit
The price may start at $22 and up
Amazon have them too
https://www.amazon.com/Luxiv-Central...a-829505650288
Or winter cover more substantial
https://www.amazon.com/Brinmar-0081A.../dp/B07J4W1HYL
You could call this HVAC store- they can help you select the hardcover that may fit your unit if you prefer it - they call it snow guard- hard plastic
https://www.hvacpartsshop.com/baytwg...yABEgJ4LfD_BwE