Google Analytics 3 desupport and forced migration to GA4

[xjki]

With Google sunsetting Google Analytics 3 (my properties stopped received events via REST API on Jul 17, 2023), there is new API for Google Analytics 4 available:

Sending events

POST request JSON payload

Perhaps by getting (required) client_id in the WebKit webview by running gtag.js('get') once, we can save client_id and then use POST requests without using any Firebase SDKs?