Has anyone had success with implementing GoogleSignin with cinterop. I'm unable to create the static .a file for this library 🤔. Is there any project on github that could be of help?

We are using it with kotlin cocoapods plugin in a company project. May be that's worth a try ?

Can you use cocoapods plugin in a non cocoapod project( I mean where shared library is linked statically)

Well technically that's possible, but that requires some manual work for linking the pods in the xcode project. But I would recommend using cocoapods plugin, it handles a lot for you. We used to have custom cinterops but in long term it's a lot of maintenance.