Managing personal Outlook.com account settings, security, and privacy
Unfortunately without the authentication methods it’ll be impossible to recover the account, however here are some suggestions.
First you can try installing the Authenticator app on a new device & trying the recover accounts option - usually this still requires authentication from the old device but you might be lucky.
Next if you’re trying to send an authentication code to your email or phone via a browser you can try a non Chrome related browser &/or try via incognito mode - many have had success sending the code from Firefox.
Lastly you can try this:
Check the Answer by "Hornblower409 Jun 25 2026" for a potential solution.