He almost always gave up the first two in his cruiserweight days, which is why everyone was so shocked when he jumped on AJ. He literally would give away the rounds to time his southpaw jab over his opponent. He would win every round.
Usyk is capable of throwing 900-1000 punches in a fight when it is his strategy to do so. Don't you worry about his stamina.
based on him doing that 5 years ago against hunter who wasnt throwing anything in the 2nd half? or what other fights he throw that many in