Is the shop next to the toilet good for feng shui?

For shop Feng Shui, look at the access and location from the outside, and the layout and furnishings from the inside.

If the location of the shop is good and the interior is well controlled, the Feng Shui will naturally be good.

Whether Feng Shui is good or not is not judged by the presence of a toilet next to it. Having a toilet next to it doesn't mean it's good or bad.