What is the advice for someone who teaches others the importance of prayer and commands her maidservant to pray, while she herself is negligent of it and only prays in front of people?

Abandoning prayer is an act of disbelief (kufr) that expels one from Islam, whether due to laziness or denial. One who abandons prayer must re-enter Islam by uttering the two testimonies (Shahadatayn) or renew their Islam by performing the prayer. If someone abandons prayer and then repents, they are not obligated to make up the missed prayers, because repentance erases what came before it. Furthermore, enjoining people to do good while forgetting oneself is among the matters condemned by Allah the Almighty and His Messenger, peace be upon him. A Muslim must be the first to implement what they enjoin and desist from what they forbid.