Publishing to TestFlight through BPP

Hey folks! I have an extension published to Chrome and Safari (through TestFlight). I was able to get Chrome publishing automated through Github Actions no problem using, but now I'm trying to do the same for Safari and I'm lost. I found and tried configuring my BPP_KEYS based on it, but I'm getting a "No supported browser found" error. Is the safari-webstore-api package supported through BPP? Or would I just need to call it directly with the Node API? Or maybe I'd be better off using fastlane directly instead?
GitHub - PlasmoHQ/safari-webstore-api
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