Amazon already has the dual usb port playstand up for preorder. Amazon Link

There is not. Theres some grip cases that offer larger stands, USB and collapsible playstands, or even Switch blades.

https://www.amazon.com/Protective-Multi-Angle-Adjustable-Shock-Absorption-Anti-Scratch/dp/B07Z95ZYQ3

https://www.amazon.com/Mumba-Protective-Nintendo-Console-Kickstand/dp/B07TBFNM5X/

https://www.amazon.com/dp/B0BCVRPFJX/

https://www.amazon.com/Nintendo-Switch-Dual-USB-Playstand-HORI/dp/B07W7FNN9Z/