Reports: Customer phase status week over week

Have a need for a report that shows Onboarding Statuses of CSM assigned customers week over week so leadership can gauge the progress of how many customers are being engaged week to week.

I have an Onboarding Status field created on the Customer Info object, but if I am not mistaken it doesn't not capture a timestamp or track the status of this field historically.

Curious if anyone else has encountered this or a similar use case and how you worked around it?