Last time, I’ve explained everything you could want to know if you wanted to put an M.2 socket onto your board ... In terms of power, you only get 3.3 V, at an amp or two.
There's at least one M.2 PCIe 5.0 slot with a huge passive ... including the 24-pin power connector, four SATA III ports, and USB 3.0 headers, are angled, which will help with cable management.