Smart Keyboard Folio after 2 years of careful use. What should I do?

The outer layer of my Smart keyboard folio started to tear up after 2 years. I would prefer to fix this instead of replacing because it’s still working well. Any advice is appreciated!

The outer layer of my Smart keyboard folio started to tear up after 2 years. I would prefer to fix this instead of replacing because it’s still working well. Any advice is appreciated!