Newbie question about refresh.

Hello everybody.

We are migrating from Report Server to cloud and we started with a few simple dashboards. We are also creating dataflows and, of course, semantic models. But I have a doubt about dashboard refreshing.

Imagine that we have a dataflow A, linked to a semantic model A, and this gives data to two dashboards, A1 and A2. We want to update these dashboards hourly, but the question is, where do I have to configure the updates? I saw that when I manually update the dataflow, there is no impact in the refresh time of the model or the dashboards, while if I update the model, both dashboards are updated. So, to automate an update of the dashboards at 8:00 pm, should I coinfigure it only in the model? Or should I schedule the dataflow at 7:30 and model at 8:00? Which is the best way to get the dashboards updated?

Thanks.