Is it normal to stunt the plant or stop drinking as much as before after lollipopping

Plant will drink less and release less moisture when you reduce its foliage. Resulting RH will be lower too, ceteris paribus. when lollipopping, don't take off the fan leaf with the nascent branch. Leave them behind if not causing a specific problem.

Less leaves = less transpiration = less water needs.

Water evaporates from the leaves through tiny pores called stomata, a process known as transpiration, the evaporation of water at the stomata creates a negative pressure (tension) in the water column within the plant's vascular tissue (xylem). Water molecules are attracted to each other (cohesion), forming a continuous column from the roots to the leaves. As water evaporates from the leaves, the cohesive water column is pulled upwards, drawing water from the roots to replace the lost water. The opening and closing of stomata regulate the rate of transpiration. When stomata are open, water vapor can escape, increasing transpiration. Chop off leaf, you chop off stomata, chop off the plants capacity to pull water through roots. Through photosynthesis, carbon is captured, up to 40% is excreted into soil, carbon, particularly in its activated form, is a water absorbent, meaning it can effectively capture and hold water.

Usaly weeks 2,3 of flower the plant is in the stretch and drinks a ton of water. Weeks 4,5,6, plant will gradually slow down how much water it needs… also you need to start making sure you give it periods where the dirt gets dry not quite as much as durring veg but maybe 2 or 3 times durring weeks 4,5,6 make sure to let the soil dry out

Yeah that’s pretty normal, especially right after lollipopping. They just need a minute to adjust, less leaves = less transpiration, so drinking slows a bit. Kinda like a quick reset. With your CO₂ and light levels, they’ll bounce back fast. Just try not to go too heavy too often and you’re golden. Sounds like you’re on track. Pictures would be helpful as well