Please advise, master, how is this kind of clothes photographed and processed? Thank you very much

Super simple. You need a camera and three studio lights, plus three soft boxes. Play a lamp at 45 degrees in front, left and right of the clothes. The lamp is higher than the clothes. Hit another lamp on the white wall on the back, adjust the light ratio and measure the white balance.

Have you lost your mind? Let's find a professional photographer. There are many, and they are very cheap, much cheaper than buying these equipment.