From the Q&A section:
Question: Is the power supply included?
Answer: For the better use of customers, we will provide power supply later, thank you for your support.
By Yima Top, Seller, on January 8, 2021
Later? What???
To report my personal resolution/experience. I've contacted AIYIMA through Amazon and the above Yima Top rather swiftly offered to send me their stock (32V 5A) power supply (PS). It became clear that they are currently out of PS stock at Amazon-US fulfilment center(s), so the supply would have to be sent from China. To my concern of delivery delay, they immediately offered for me to purchase a device "locally", and they would reimburse the cost. I informed them that I've just purchased a $22.50 (48V 3A) brick, and got issued a $22.50 refund through Amazon against my original purchase (Amazon confirmation email popped up next morning).
Our "conversation" happened over Amazon-backed emails around 1am EST. Nearly live - around ten messages exchanged both-ways within half hour or so. While there definitely was some small language barrier, overall, I consider AIYIMA's handling of my issue top notch.
On a grander scale, I would definitely recommend AIYIMA to decide whether the [Amazon] offer is with or without the PS, clearly indicate it in the product description, and stick to it. (Eg, by temporarily halting the "availability" if running out of PS stock). DIXI