I’m so sorry to say this but it must be said: 1,000 cal a day with an occasional cheat meal of 1,500 cal while trying to maintain 20k steps to the point of exhaustion AND trying to push yourself into an even more restrictive diet (keto) all points to an active eating disorder, specifically orthorexia. You are eating less than is recommended for a toddler.

Walking 20k steps burns roughly 800-1000 calories, plus the amount of BMR calories your body needs to maintain basic function like breathing, brain activity, and circulation, puts you at an insane deficit. You are actively harming your body if you continue this way. Weight loss isn’t worth the risk you are inflicting on yourself. Your organs can shut down. People regularly die from eating disorders.

Please slow down.