Hello, you can check how it will work here: https://video2.skills-academy.com/en-us/windows/security/operating-system-security/data-protection/bitlocker/preboot-recovery-screen
Along the article you'll find a link to the steps needed to enable, or just click here for it: https://video2.skills-academy.com/en-us/windows/security/operating-system-security/data-protection/bitlocker/configure?tabs=os#configure-preboot-recovery-message-and-url