You can enable it via https://id.atlassian.com/manage/two-step-verification. This would only work for your account.
However, if you're referring to Atlassian Access 2FA which would affect all Atlassian Account associated with the verified domain, you would need to exclude all the accounts except yours, once it's enabled. It's a manual work and a bit tedious if you have a lot of accounts associated with the verified domain, but it would allow you to manage all accounts.
We have a guide on how to do both:
Hi Atlassian Community, My name is Avni Barman and I am a Product Manager on the Atlassian Access team! One of my top priorities is to help make the administrator's life easier through improved pro...
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