At the moment, it is possible to setup 2FA on your profile, however, there is nothing telling you that it is possible unless you go and scratch around the site and settings to find it.

I would suggest adding as part of the registration step, when confirming your email, that you get a prompt to setup 2FA, otherwise you can't use the site. This will enforce security and anyone logging into the platform that do not have it setup, needs to be prompted for setup the next time they login. We do this on one of the products that I work on in the telecoms industry as well. Alternatively, do the prompt on registration / email verification and allow the user to choose to set it up later, but guide them maybe with a banner or something to set it up as soon as possible to secure their account and maybe a button that takes them to the setup.