Older trackpad with new M4 Mac Mini?

I'm going to purchase a new Mac Mini and am wondering if the trackpad I have now will continue to work with the new computer. The trackpad is about 6 years old, charges via lightning connector, and has firmware version 3.1.1. If I could save a bit of money by not buying a new trackpad, that would be great. I do plan to buy a new keyboard, though.