Hi @Athulya Pillai @Athulya Pillai
By default, all SharePoint cookies are session cookies. These cookies are not saved to the browser's cookie cache and instead are deleted whenever the browser is closed. Azure AD provides a Keep Me Signed In button during login that passes a signal to Microsoft 365 to enable persistent cookies. These cookies are saved to the browser's cache and will persist even if the browser is closed or the computer is restarted.
Differs from SharePoint Server, there are no more other sign in methods in SharePoint Online. For more information, you could refer to:
https://learn.microsoft.com/en-us/sharepoint/authentication
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