Step 2 Offers Desktop Based 2FA

Since Authy deprecated its desktop app and has also been recently hit by security breaches, you may be looking for a replacement two-factor authentication solution. Step 2 from indy developer Neil Sardesai provides you a way to scan QR codes from websites offering two-factor authentication via time based one-time passwords (TOTP) to log in, sites like Facebooks, Evernote, Twitter, Reddit, Notion and others. Using this method allows you remain safe even if your password gets compromised since it's based on factor one, something you know - your password, and factor two, something you have, your computer with an authenticator app. There are several well-known and widely used authenticator apps for iPhones, Microsoft Authenticator and Google Authenticator are two. Step 2 is iCloud based so it works across devices. Step 2 is an iOS/iPad-based app, so it only works on Apple silicon-based Macs.

Step 2 is free to try in a limited way from the App Store. An unlimited license is $9.99. 

Another player in the field is Raivo OTP, but its latest reviews are very, very poor and I can't recommend it.