@luceos after some investigation it looks liek its close but not fully there. The Javascritp Google Analytics 4 gives is
<script async src="https://www.googletagmanager.com/gtag/js?id=G-personalCodeGoesHere"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-personalCodeGoesHere');
</script>
Looking at my own page source it looks like using this in the current state it is just missign this line:
gtag('config', 'G-personalCodeGoesHere');
No idea how much that one line matters... but may need to be added for this extension to work with the new Google Analytics 4.
