The option to install more than one app using the option "Use provisioning profile's application ID" .The method Sideloady uses is by adding alphanumeric at the end of the real app's bundle ID for example com.google.ios.youtubemusic.4X6DGHY8U. The alphanumeric is generated from the provisioning profile. Here is an example from this image : https://imgur.com/a/25siHDs.