@ChikaraTaro, Thanks for posting in Q&A.
From your description, I know you want to create a policy to allow non-PIN logins on Autopilot device via Intune.
Based on my research, once you enable Windows hello for Business, it will let you configure PIN to login in, however, you can also use other methods to login in, for example, Microsoft Entra ID account password.
If you want to disable PIN login, you can try the method mentioned in the link below to disable Windows Hello for Business and try to use Microsoft Entra ID account to login in.
Non-official, just for reference.
Hope above information can help you.
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