Email Encryption Transport Rule > Blank Sensitive Information Types List?

I'm setting up M365 email encryption and for some reason the Sensitive Information Types don't load or the list is blank?

Specifically, I'm setting up a transport rule -> new rule -> Apply this rule if: The message contains any of these types of sensitive information. I want to add SITs like Routing #, SSN, etc.

When I click to select the type of SITs, nothing loads. It just says "No data are available" and I can't really do anything except for clicking Cancel.

The licensing assigned to the users I want to apply the rule to include: Microsoft 365 Business Basic + Azure Information Protection Premium P1.

I've already applied the rule where I can set custom words or whatever in the subject and that works fine. I'm just not able to choose any default Sensitive Information Types.

I know I've done this before for users who had E3 licenses in the past - is this feature not available in the P1 license or am I missing something else? I'm used to seeing options for ABA routing number, medical terms, SSN, etc. to choose from when setting up transport rules for email encryption - but this list is empty.

I've even logged into a different tenant that has a M365 E3 user to compare and their list of Sensitive Information Types under the mail transport rule menu doesn't populate any results either.

Thanks for the help