Not sure what you mean? Most routers will restart anyway if you have a power cut. unless you mean something that will shut down the router and the restart it.
some routers have that built in, My TPO link archer ax53 have a reboot schedule in the system menu, but not really sure why anyone would want it.
Adrian
Desktop machines Mac mini pro with macOS Ventura, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,