TOTP App

TOTP App	Browser Integration Mobile	Browser Integration Desktop	Pro	Contra
KeepassXC recommended	yes	Via browser plugin.	Save extra data. Optional: Sync to many devices. Every browser, on all devices, offers the same latest credentials.	-
Microsoft Authenticator	yes	-	Known to many users	Only on mobile. Only on ONE device.
Google Authenticator	yes	-	-	Only on mobile.

There are other apps and online services, acting as TOTP Apps.
TOTP is a standard.
MS-Authenticator: If the mobile phone changes, remember to de-register first, before a new one can be registered.

[1] Open any Authenticator App on your phone, or (if using Keepass on a desktop) just copy the secret

[2] Type the new TOTP Code shown on your app into (2), to finalize the registration.