Entra ID protection risky sign-in reports, what is the maixum days you can review in the report??

 30 days

The risky sign-ins report contains filterable data for up to the past 30 days (one month). ID Protection evaluates risk for all authentication flows, whether it's interactive or non-interactive. The Risky sign-ins report shows both interactive and non-interactive sign-ins

https://learn.microsoft.com/en-us/entra/id-protection/howto-identity-protection-investigate-risk