In previous versions of NBA 2K, players were accustomed to shooting meters, and in essence, you rewarded you for releasing you at the moment of shooting. the system in NBA 2K21 is quite different. The effective area is located on the side of the light meter, and the place can vary depending on the shooting location. Essentially, this means that every shot in NBA 2K21 requires a slight change in the way the rod moves. That makes the technical ceiling of shooting higher than in the past.

Here are some tips for using the "Pro Stick Aim" option, which is enabled by default.

Pull down the right stick
Note that the meter starts close to the center, not to the left or right.

After pulling back
Adjust the joystick position to the left or right according to the place of the high percentage area. It will be helpful if you align the target correctly.
When using the Pro Stick Aiming, there is no need to release the lens. Just pull down the joystick, adjust the target, and the character will take care of the rest.
There is no penalty for using the trigger to make a missed shot, but it will get more impetus if done correctly.

Combined with this promotion concept, it is worth noting that shooting has been completely troubled by NBA 2K21. Developers have done this, and sharpshooters need to maintain their overall performance at least at the lows of the 70s or 80s to score consistently. Therefore, if you use these techniques and still fail to achieve, you may be using the wrong pitcher.

In short, using the Pro Stick is to pull it back, adjust its position to be slightly closer to the shooting area, and optionally use the trigger to increase the timing. If you can master this excellent action, you will get regular greens soon.