If you copy parts between schematics it doesn't add them to library automatically. What you may for example do is:
1) generate library from reference schematic,
2) COPY & PASTE the components you are planning to use into your library and adjust them (e.g. add parameters),
3) copy the part of reference schematic (which you would like to re-use) into your schematic,
4) and replace the components in the copied circuit with the components from your library
In case, you are going to use majority of the reference schematic, you may want to generate library from it and use it as your project library (just adjust the components to your needs e.g. add parameters) and refresh the schematic (Update symbols from library).
If you would like to generate library from a project, this may help you: Altium â€“ How to Create Library from Existing Project