Please research (on your own) revenue stream for open sourced Moodle.
Providers have cPanal/WHM but it looks like WHMCS is a plugin/addon for WHM ... maybe you should talk to your provider. OR start your own hosting for Moodle ... a non-blessed quasi-MoodlePartner (part of that 'revenue stream' mentioned above).
WHCMS - does claim:
"All the tools you need to start a web hosting business today"
And all you have to do then is inspect current Moodle code for 'environment' checks ... and Git for Moodle Admins:
https://docs.moodle.org/38/en/Git_for_Administrators
Maybe your provider needs to replace Softactulous (if they offer that addon to cPanel) with WHCMS. As I undestand them, cPanel/WHM is perl based and there are plugins that each could have installed - for a fee.
And here's a biggy ... the 'customer' that has delayed updating or upgrading their Moodle for years ... still running 1.9.x ... and wanting now to upgrade all the way to 3.8.x (latest and greatest). So just how far back to 'legacy' would WHCMS support?
Not discouraging you here ... go forth ... figure WHCMS out ... and you could make a lot of $'s! You could become part of that 'revenue stream' mentioned.
'SoS', Ken