Are you asking to import setting to other existing projects?
If yes… I can’t assist with this because I have never done it. So hopefully others will chime in.
But, if you are asking how to start new projects that are set up similar to one that you already mixed and are happy with then, in my opinion, creating a template from that project might be the way to go.
To do this you are going to save the finished project as a template (File>Save As Template). Now you have a template saved exactly like that project with all tracks, effects, and routing. Also, all of the data previously recorded. So you will need to “clean up” the template by going into each track to delete recordings, automation, gain, pan settings, etc. Re-save that version as a template (overwrite the one you previously saved). Basically you want to end up with a template that is an empty project but has everything else set as you typically want.
Then when you start a new recording session you start the project (created in it’s own new folder) using that template. Typically I will name and save the newly opened project (in the previously created folder) immediately after creating it.
I have approximately (6) different templates created as I mentioned above. In general they cover most of the types of recordings I do. If not, I start with one that is the closest to what I think the project needs then when I am finished recording/mixing I’ll create another template from that finished project.