Is it okay for shops to sit on pillars?

Not good.

It is said in Feng Shui that pillars in shops are likely to have a great impact on people's career and wealth. Doing business is the most important thing about wealth, so it is better to remove them.

Pillars are very evil. The owner of the house is prone to bad tempers, difficulty in communication, and is prone to bloody disasters, or has impaired vision. Place white jade gourds and ancient coins of the Five Emperors, or face the direction of the pillars and hang them for consecration. Just pass Shanhai Town.