Thx for the insights, everyone. It is not clear what the specific issues are that would prevent an Angular Component from being exported as a Custom Element and whether they are generic or related to the specific project setup. As such, this issue is not really actionable for us.

I believe the main underlying problem is being able to easily consume Angular Elements in non-Angular apps, for which we don't have a great solution yet. This is tracked in other GitHub issues though (such as #25421 and #33942), so let's close this one and track the problem there.