No data in Inbox deliverability tracker - how do I configure?

Hello!

I've properly added the DNS information to set up the new Marketo Inbox Tracker / Deliverability Tools several days ago, however, I'm still seeing no data found across all the dashboards. Are there other configuration steps that I must take? 

I've seen some of the high-level videos here, but I'm looking for some more robust product documentation on configuration and use of each of the features:

https://experienceleague.adobe.com/en/docs/marketo/using/product-docs/email-marketing/deliverability/inbox-tracker/inbox-tracker-tutorials

Thank you!