Hi @Marybird
The entry Pin is in place to protect the phone and contents so if your pin isn't being recognised and you have no other option to unlock then you'll need to log into your Samsung Account to go through the security process to reset it.
Please Google Search for further assistance via Samsungs help pages.
I wish you all the best with this situation.
🌈 Stay Safe 🌈
Daily Driver > Samsung Galaxy s²⁴ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
