The answer to 'why is my garbage disposal no hot water' is that the garbage disposal and hot water supply are separate systems. The garbage disposal does not require hot water to function properly. The lack of hot water is likely due to an issue with your home's hot water heater or plumbing system, not the garbage disposal itself.
If you are not getting hot water to any fixtures in your home, it's a sign of a larger plumbing problem that will require professional diagnosis and repair. This could be due to a malfunctioning water heater, leaks in the hot water pipes, or other issues in your plumbing system. It's best to call a licensed plumber to inspect your home's plumbing and identify the root cause.