My profile → Security log lists the last 90 days of sign-ins and security changes on your account, newest first. Use it to check that every sign-in was you.
Where, for sign-ins: the approximate place and the browser, for example "Gurgaon, IN · Chrome on macOS".
You see 10 rows at a time. Show older loads the next 10. When there is nothing in the last 90 days, the log says Nothing has happened in the last 90 days.The log refreshes on its own after you change something on the same page, such as adding a passkey.
If you are a company admin, changes you make on the company Sign-in security page also appear in your own log, for example "Required two-factor authentication for the company". The company's full record is in Settings → Security → Audit log.