Hello. Will the Librem 5 phone be developed since it is using it’s own OS to run apps such as KiK or SnapChat or Instagram?
The Librem 5 with PureOS will NOT run SnapChat, Instagram, or Kik out-of-the box due to restrictions with the FSF/GNU FSDG Guidelines. They may be supported as a web application or via Anbox in the future.
- SnapChat, Instagram, and Kik are non-free.
However, the Ubuntu Touch version of the Librem 5 should. 
Source: Android Apps on Ubuntu Touch with Anbox, Purism & UBports
Note: You may need to install Yalp Store before installing non-free applications.