Thank you for your response Nightwolf483, it is very detailed and if we ever have a similar issue I’ll definitely try some of these suggestions.
In the end my partner converted the project to UE5.3 and that fixed it. I wouldn’t exactly call it a solution, but at least we can build again.
We didn’t want to do the conversion to 5.3 since it has issues with our project but those issues are more manageable than the packaging issue.