the power went off in my home and the home pod is not working any more

Are you saying the HomePod is not working after power was restored?

it might have suffered a power surge and they can fry electronic equipment unless it had been connected to a power surge protector.

you can try rebooting the wifi router and also try power cycling the HomePod or try another outlet

failing these efforts you can try resetting it

Reset HomePod - Apple Support

Hello,

HomePod, like all electronic devices, need electricity. If your home does not have electricity then your HomePod will not work.