At this point if both batteries are not showing any data, either you have two bad batteries or SMC logic has problems. I would pull the logic board out and make a detailed inspection of the other side as thats where the SMC logic is located.
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=== Update (04/24/2020) ===
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Here’s the needed guide to follow to take the logic board out [guide|27662]
Well, this is not good at all!
At this point if both batteries are not showing any data, either you have two bad batteries or SMC logic has problems. I would pull the logic board out and make a detailed inspection of the other side as thats where the SMC logic is located.