Hello @JulieBac and @NNM_Aus,
Great question!
At present Klaviyo is wrapping up and resolve an incident pertaining to a delays in analytics processing. You can always see if Klaviyo has any known incidents by taking a look at the Klaviyo Status Page. On this page you can subscribe to receive news or updates pertaining to these issues and outages Klaviyo may be having to be as informed as possible of your account!
I hope this helps! Thanks for being a part of the Klaviyo Community and for your patience as our team works to resolve this incident!
David