How do I verify my MacBook Air from another device?

There may be something to this article ~ along the lines of what you need.

"From your Mac:

1. Go to Apple menu  > System Preferences, then click Apple ID.
2. Click Password & Security > Get Verification Code."

• Get a verification code and sign in with two-factor authentication - Apple Support

https://support.apple.com/en-us/HT204974

"..With two-factor authentication, you'll need a verification code to sign in

with your Apple ID on a new device or browser. Whenever you sign in with

your Apple ID on a new device or browser, you'll confirm your identity with

your password plus a six-digit verification code. There are a few ways you

can get a verification code.."