I was on a flight as well and was watching nose wheel cam. The flare was quite long and the go around was initiated just before the nose wheel touch down. I did not notice tail strike but I thought reversers were actuated for brief moment. Could explain lack of thrust during rotation as there is definitely some delay if it went to reverse. From a Live ATC archive file - Departure freq 21:30z (approx 06:00) the pilot said they wanted to avoid long landing. I can confirm that on PA he said it was due to occupied runway. Funny thing was that the captian was standing by door saying bye to passengers as if nothing happened. Maybe he did not notice tail strike as well 🙈