Authenticator app in Apple watch

doubt it, they just dropped support for apple watch altogether

Authenticator: Microsoft discontinues its Authenticator app for Apple Watch, here’s how it will affect users - Times of India (indiatimes.com)

I recommend Okta Verify which works better than MS Authenticator anyway.

I was able to set up TOTP authentication on my Apple Watch using the Duo app.

1. Go to https://mysignins.microsoft.com/security-info
2. Add a new sign-in method and select "Authenticator App"
3. At the bottom of the pop-up, choose "I want to use a different authenticator app"
4. Scan the QR code with your preferred app

This is the Okta watch screen showing codes for my MS account and my Wife's MS account

I only wish I could remember how I set it up but it was done on the iphone

LD150 wrote:

I recommend Okta Verify which works better than MS Authenticator anyway.

BTW Okta Verify no longer works