Can I track same event tags from GTM for different GA4 Tags?
I would like to have another GA4 for the same application but different environment. If I configure new GA4 config tag, GTM should send data properly for both GA4's?
Currently not. You need another ga4 event tag to fulfill this requirement.
But I think the easiest way is :
Downside for this is you need to maintain 2 set of GA4 tags in the future.