It shouldn't be a problem. All the things that matter come with switching power supplies. Switching power supplies can adjust. They normally handle everything

It shouldn't be a problem. All the things that matter come with switching power supplies. Switching power supplies can adjust. They normally handle everything from Japan at 90v to Nigeria commonly exceeding 250v. They also internally have capacitance. For everything else, it just doesn't matter. I couldn't even tell if power for the toaster oven dropped to 70v for 200ms.