Questions about ready2gaming Universal adapter for the GBA & DS series + for Nintendo Switch

Is a normal usb on the other side. You can use any usb power supply

1 USB port with multiple cables

Power adapter and the cables. As in the product photo.

Yes, it also works with the switch, but it only has 10 watts compared to the original, which outputs a maximum of 39 watts.

As far as I know, no. The 3ds and wiiu gamepad cables look similar but are not compatible.

This is a charger for Nintendo devices, not a video cable. It's probably no good as a power supply for TVs. So if I understood the question correctly, the answer is: no.

According to my information, this is not compatible.