I did not have an orchi. I had regular penile inversion GCS.
For me, I felt no effects from the loss of Testosterone. I just felt so good the moment I woke from surgery. My gender dysphoria was gone and never returned.
My recovery was significantly more involved than yours. Even so, I cannot pinpoint any specific time where I felt a loss of energy. Post op, I am not as driven as I was before, but I really have come to embrace my life as it was meant to be. Everything seems to be just really good right now.