I noticed bee carcasses below my tbh, I assume they are drone brood, correct?

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Also I have four combs at the end that are essentially empty. My entrance is at the opposite end. I've observed what I thought was robbing, though it wasn't as violent as I thought robbing was supposed to be. I'm concerned that there aren't enough honey stores to get them through the winder. I'm planning on going through all the combs this weekend (there are 19 drawn/occupied bars, plus the 4 empty ones).
Anyway, any thought as to how normal this all looks? This is my first year so I'm never sure if what I'm seeing is considered "normal" or not....

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