Hi Abraham,
I'm Sumit, here to help with your query on the Microsoft Q&A forums.
Apologies for any inconvenience you are experiencing. I am happy to help you today.
Please turn off the slider titled:
For improved security, only allow Windows Hello sign-in for Microsoft accounts on this
device (Recommended)
This should disable the Sign in Windows Hello requirement, which should enable the Remove PIN button.
I hope you find this information useful. If you have any more questions, don't hesitate to reach out. Otherwise, please take a moment to accept the answer. Wishing you good luck!