https://wccftech.com/custom-m1-imac-gets-made-using-a-m1-mac-mini-other-parts/

Apple’s M1 iMac might be coveted by millions, but in terms of hardware, it is not any different than the M1 Mac mini. In fact, you would not have to upgrade to the M1 iMac if you already owned existing hardware, as one YouTuber shows, and save a great deal of money.

The YouTube channel Created Tech decided to make this custom M1 iMac because he already had an existing Dell 4K monitor that was height adjustable and could swivel, something that an M1 iMac cannot do. He also implied that with an existing M1 Mac mini, upgrading to Apple’s AIO would not be necessary, so he decided to purchase a few parts and ‘hook’ the M1 Mac mini at the back of the Dell 4K monitor’s stand, creating a custom M1 iMac.