Why isn't my dev store's data showing up in Google Analytics 4?

Hey!
Setting up a dev store for our app development.

So the store is just for testing. But when setting up the GA4 connection I don’t get the data to GA4.

Google Tag Manager seems to work, the tags fires in tag manager and the data layer looks right (so it shouldn’t be a shopify problem really). But when I look in GA4 I don’t see any data, what so ever. And yes, I have double checked that I have the correct measurement ID, that all tags a submitted and published in GTM.

Anyone who has had the same issue?