Hello EliHoffman,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
To Change Windows Hello PIN,
- Open the Start menu and Select Settings.
- Click Accounts > Sign-in options.
- Under PIN (Windows Hello), Select Change your PIN.
If you are having trouble changing your PIN from the sign-in options, lock your PC.
Select the 'I forgot my PIN' option on the sign-in screen to reset your PIN.
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.
Best regards,
Gunasekar N