__Summary__:
In the classic UA measurement protocol you were able to add traffic source data, and overwrite the user IP and user agent to page_view events.

In the new measurement protocol the description of sending over a page_view with these parameters are missing. Also, adding them manually does not seem to work (both in the body and as URL parameters). Could you provide documentation or clarrification on when this is expected to work?

The fields questioned (as documented in UA measurement protocol):
- _uip_: overwriting IP address
- _ua_: overwriting user agent
- _dr_: location referrer
- _cs, cm, cn, cc, ck, ci_: UTM parameters for source, medium, campaign, term, keyword, campaign id and other advertising identifiers.

__Expected Behavior__:
I would expect the measurement protocol [Reference > events](https://developers.google.com/analytics/devguides/collection/protocol/ga4/reference/events) to contain a __page_view__ event detailing how to add these fields. As an example, I would expect the fields to be added in the _JSON_ body of the event:

```javascript
const measurementId = `G-XXXXXXXXXX`;
const apiSecret = `<secret_value>`;

fetch(`https://www.google-analytics.com/mp/collect?measurement_id=${measurementId}&api_secret=${apiSecret}`, {
method: "POST",
body: JSON.stringify({
"client_id": "client_id",
"events": [{
"name": "page_view",
"params": {
"engagement_time_msec": "1501",
"session_id": "123",

"ip": "185.19.103.0",
"user_agent": "Mozilla/5.0 (Android 12; Mobile; rv:102.0) Gecko/102.0 Firefox/102.0",

"page_host": "https://example.com",
"page_title": "Home page",
"page_referrer": "https://blog.com",

"utm_source": "blog.com",
"utm_medium": "blog",
"utm_campaign": "summer",
"utm_term": "referal",
}]
})
});
```

I would expect the following to show up in Google Analytics dashboards, both the real-time, tech overview and user acquisition reports:
- Location of the user based on the IP address overwrite
- Breakdown of the browser technology
- Acquisition of the traffic source based on the UTM tagging

__Steps to Reproduce__:

1. Setup a new empty property
2. Trigger the test code towards this property
3. In _real time_ overview the event shows up, but without a) user location, b) device shows up as desktop and c) no traffic information of the user known
4. User does not show up in later reports around tech, acquisition and engagement.