DataTag to GA4 how to?

How can i send Data from the Data Tag to the outgoing GA4?

I have seen this post here Data Tag / data client to GA4

but i dont understand how to do the last point so that i can add the data tag event parameters to my ga4 server side ? Thanks

Only GA4 hits are recommended for GA4 events, I would not recommend using Data tag - Data Client hits for this.