You can permanently delete your Move & Measure account and everything in it, even if you no longer have the app.
What is deleted: your account and every profile under it, with all workout sessions, body measurements, food and supplement logs, the weekly schedule, and any Google Health or Apple Health connection and the step and weight figures synced from it.
This cannot be undone.
Open the app, go to Settings, and choose Delete account. Sign in with Apple is only available inside the iPhone and iPad app, so this is where an Apple account is deleted. To also remove the app from your Apple ID, open iOS Settings, then your name, then Sign-In & Security, then Sign in with Apple.
Email rdshad@beesbloomsandbytes.com. The app keeps no name or email address, so we cannot find an account from an email alone; signing in as described above is how the account is identified.