Note that Symantec VIP uses standard TOTP. Someone reverse engineered the communication protocol to do the original communication to obtain the credential/key used to register with your Symantec VIP using institution and has a github project for a python script that implements it.
There is some 4 character code that you need as part of the initial process. Which of the few such codes is needed for a few large institutions are in some blog posts about the github project. So some experimentation may be needed for others.
The bottom line is that once you succeed with the script you can use any TOTP application you like as your 2FA.
I use keepassxc on my laptop. I don’t know what would be good to use on a Librem 5.