TOTP app for SL7 (RHEL7), preferably RPM?

We are unfortunately stuck with Scientific Linux 7 (a RHEL 7 clone) for a while longer, until we prepare our move to Ubuntu later this year. Our organisation is now also starting to require MFA for email, and we need to try to find a TOTP app suitable for our Linux users (as a fallback option additional to smartphone apps, or for users without smartphones). **KeePassXC** does have TOTP capability, but sadly the EPEL RPMs only seem to be available for EL8 onwards. If there is a suitable older version somewhere in the KeePassXC git repo I don't know the appropriate magic to try to find it, unfortunately. As our systems are automatically configured, alternative app formats such as Flatpak, AppImage or snap unfortunately won't work. Does anyone know where a suitable older RPM or, if need be, compatible older source code could be found? I have also looked into **oathtool**, but its manual is rather cryptic as to how you actually get it to work, and if it really needs all the configuration and additional support scripts described in nixCraft's instructions for oathtool , it would unfortunately be just far too complicated for our end users to use. Alternatively, are there other TOTP apps that would be suitable for use with SL7/RHEL7?