This "theoretically" allows for bulk activity, but we've found Google to be very temperamental (big surprise). One day they allow a single question and answer to post to hundreds of locations. The next day they still accept the file, but nothing is published. Sometimes they publish to the Knowledge Panel but then are removed the next day. There seems to be some unwritten rules (at least we haven't found them) about how much bulk activity is actually permitted.
Really appreciate your response. Interesting enough, your feedback about the Q&As disappearing is similar to what I have heard from others who are doing it manually from their personal email address or from the same email address as the GMB account.
I'll let you know if we attempt to use the API and have any success.
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