InterWorx doesn’t have a GUI for managing modsec and CSF doesn’t come installed by default. If you installed CSF manually, then it will be set in testing mode to start. This means it will function normally for 5 minutes on startup and then disable itself so you can’t accidentally lock yourself out of your server. You have to modify the csf.conf file to disable testing mode (near the top of the file) and then restart CSF/LFD.
CSF will try to disable APF and BFD if it detects them during installation.
If you want more of a GUI for security options and are using the latest InterWorx v7, I believe you can buy and install Immunify360. It might be a better choice if you’re not familiar with how to use your servers various options via the command line.