Canon scanner Life 210 on OS 11 Big Sur

I assume that you are saying that Cannon says that they no longer offer support for this model scanner. If so, there are two options. You should be able to scan using Apple's Image Capture app. Although it scans, it is not full featured. You can download and try the app VueScan. It is a fully supported, full featured scanner app that should work. There is a fee for it. I bought it and can recommend it. (I am not associated with VueScan.) Good luck.

Try the drivers offered by Canon at this site: Drivers and Downloads

If that doesn't work give VueScan a try. It has a demo version you can try before purchasing. It does support the 210 model.