Airdrop is not an option in my new MacBook?

Hello,

I bought a new MacBook (Retina, 12-inch, 2017) two weeks ago. It's updated to macOS High Sierra (version 10.13.1). It should have the Airdrop function, but it doesn't.

Airdrop doesn't appear in my Finder sidebar and the option to put it in the sidebar doesn't even appear, as you can see in the pictures below.

When I search "Airdrop" in my Spotlight, the option for Airdrop shows up, but when I click into it it says the item cannot be found (see pictures below).

This was also a problem that showed up in my old MacBook Air, and I was thinking maybe it's something that was transferred to my new MacBook because I used Time Machine to transfer all my files over?

Please help! I find the Airdrop function really useful and I used it a lot when it worked on my old MacBook Air.