Equivalent of “microsoft authenticator” or “authy” with open software?

That looks like a BASE32 encoded seed that you can manually enter into google authenticator. If you need to use it on a PC then you could download SafeID authenticator, and if you want to get fancy it is possible to burn it onto a programmable hardware token.

Other parameters that may help are it will use SHA1 and almost certainly use 30 second windows (you are unlikely to be asked for these parameters). If the window size doesn’t appear to produce the expected codes you could try 60 second time windows, but check the clock on your device first.