does tyson's apple store recycle old iMacs

See the following from Apple Trade In - Apple

Yes. Apple Trade In lets you recycle any Apple device (including devices from Apple-owned brands) at any Apple Store and on apple.com for free. That includes your batteries and old electronic products as well as free, on-demand packaging recycling for our commercial, education, and institutional customers. When we receive your device it will be thoroughly inspected to determine if components can be recycled or reused. Whether recycled or reused, all activities relating to the processing of your device will be managed in an environmentally responsible way.

I’d certainly call to confirm first given Covid-rules.

Buy yes ... they normally used-to.