OK I found the solution to my problem, answers to th is post are unneeded😀

Im not sure about SFSafariViewController, but a more capable alternative that I can verify to work in the WKWebView.

I’m targeting macOS for this particular app.

Two questions: Is it a problem if my shared library has a .so extension? I’m curious: how could I do this with a multiplatform SwiftUI app that runs on iOS and macOS? how would the code be packaged into a .framework file?

Would it be easier to create a static library and use that instead of using a shared library?

Is there a reason that you posted this thread twice?

How exactly would I modularize my headers?