The Endwalker patch content has been a series of experiments (and that's ok)

[Noumenon]

If you read through the sections provided in IS, the game explains clearly how you get the efficiency bonus. You just have to engage with the content and work it out.

It's amusing that you think these words will be received in any manner. Unfortunately, the forums do not have a minimum requirement of being able to read and understand the content before making any comment on it. Which is why you have people who do not even know how to get an efficiency bonus by themselves, which is so astoundingly simple that we are led to alternative explanations for this phenomenon if they actually did try reading it.