There is not a lot information available at the moment how Bitcode will work for frameworks, but given the statement above you will be fine with the standard framework.
over 8 years ago
I saw an article that mentioned about "Apple Bitcode".
"Bitcode. Instead of uploading pre-compiled binaries, developers upload what Apple calls an ?intermediate representation? of the app. The App Store then automatically compiles the app just before downloading. This allows it to automatically implement part of App Slicing even if the developer hasn?t bothered to tag their code, downloading only the 32- or 64-bit code as required."
I'm wondering about your plugin code. Now you are providing .a library file but Apple will ask to upload bitcode.
So do you have a plan to provide bitcode for iOS version plugin?