I recently sent my MacBook Pro to Apple for a recall on the Battery. Since getting it back I cannot sync my Apple watch with my MacBook Pro How do I get that back?

I recently sent my MacBook Pro to Apple to have the battery replaced because of a recall. Before sending it in I could connect my Apple watch to the computer allowing easy open of the computer when wearing my Apple watch. Since getting it back I cannot connect my MacBook to my Apple watch to make it easier to open MacBook. How do I get that feature back on my computer?