Do you mean the syndrome that causes lightheadedness when standing up?
I found a 2021 research article that shows 6 months of regular cardiovascular exercise improves the condition. Some forms of physical yoga practice are vigorous and get into the cardio range.
I can’t find yoga-specific studies on POTS, but there are many on other conditions that include dizziness and syncope as main symptoms. That’s what a quick google scholar search revealed.
Yoga emphasizes attention and breath awareness during the movement practices. I personally have a job that requires a lot of stooping and standing. At first I was often dizzy standing up, but as my practice has intensified and progressed that has gone away completely.
I don’t know, if your physician clears you for the activity, there are many benefits to it. Maybe worth a deeper look?
And as for general awareness, hell yes. That is the entire focus of yoga philosophy, to quiet the busy mind. The scientific studies on that are plentiful.