I see that you are posting this in the LPCP section of the forum, have you confirmed you are on a LPCP server?
You can check by looking in your control panel, if you are on LPCP it will say LPCP in upper left, if on cpanel it will say cpanel on the upper right.
If you are on cpanel, then softaculous is currently not available on cpanel, and you would need to be moved to a LPCP server.
If you would like to be moved to a LPCP based server, or are already on a LPCP server and not seeing softauloous you will need to contact support at
support@lunarpages.com (email) or support.lunarpages.com (web)