The answer to 'why is my toilet no hot water' is that your toilet is not connected to the hot water supply. Toilets typically only use cold water for flushing, and do not require hot water. The hot water in your home is likely used for other plumbing fixtures like sinks, showers, and washing machines, but not the toilet.
If you have a toilet that is connected to the hot water supply, this could indicate an issue with your plumbing system or the toilet itself. It's best to have a professional plumber inspect the issue to determine the cause and make any necessary repairs.