This is about _tankless_ toilets. They only work with electricity-powered flush pumps. That's why the author wrote about having to physically dump water into the toilet to flush it.
replyFor our new home we're making we have two toilets (always practical). One of them is tankless, but we made sure the second one is a traditional cistern toilet with no electrical requirements. Just in case.
Most well pumps are electric powered. The holding tank will give you a very small amount of water that’s in it if it’s up high but after that without electricity it won’t refill.
replyIn the USA most residential toilets are tank type and don’t directly use electricity.