Third week looking good

people tend to defoliate around day 20 of flower.

Just to provide a counterpoint to Organoman - the very purpose of trichomes and the contents is to protect the flowers, firstly from radiation. From this understanding, more photons impacting the flowers would presumably provide an impetus for increased trichome coverage. Energy requirements and the capacity to make energy being outside and irrelevant to that mechanism. The process of having photons interact with trichomes, the subsequent damage, and the recurring cycle of repair being (IMO) material to fat, dripping trichomes. From a heuristics point of view, you are indoors and will only be truly dialed in for a very specific plane with your light fixtures. Make this plane be your canopy and forget about everything else. underlighting is generally flawed in theory and application, the canopy is where it all counts indoors. outdoors the sun does it all for you, add dirt and done. I always defoliate heavily around this time, but I stretch into flower as part of SOPs... so I am moreso correcting my canopy at this time. It is just like any other training activity... trade stress on the plant for steering it with intent now. For me, that means I take a small L 3 weeks in such that there are zero larfy buds or wasted energy making larfy buds for another second. Honestly, I'd do it earlier if i could without hormone shenanigans going wild...

Not needed. Just remember.........more leaves = more energy being made = more growth = more buds. Buds do not need direct light to grow, just like how fruit does not only grow on the sunny side of trees! Buds do need the leaves to make the energy that they need to grow. Also, your plants are looking over fed, dial back the feeding a bit.

There's all kinds of opinions on this but I do at the end of the third week day 21 and prune, not a lollipop, do that before flower. I will defoliate again day 46 ish and expose buds more but no pruning. Good luck