This post seems like AI generated content and I half expected it to end with trying to sell me some snake oil.
If you're actually curious what brain fog is / feels like, it's very well documented. There's nothing "profound" or "miraculous" about it. Here's the first result I found.
Describing How Brain Fog Feels https://www.verywellhealth.com/brain-fog-8363295
Feeling mentally drained happens to everyone from time to time, especially when experiencing sleeping difficulties. But brain fog is not the same as fatigue or lethargy, although they often go hand in hand or co-occur with symptoms of other conditions. Brain fog can be hard to define since it is not a medical term or diagnosis.
Experts describe brain fog as mild memory loss or:
Unusual forgetfulness
Fuzzy memory or sluggishness when trying to remember things like names, dates, where you put your keys, and other important things