Yep, that was it.
I have a micro-frontend platform with all the MFEs built in Angular 14. For anyone else with the same problem, this is what fixed it:
Additionally, checkout: "Remarks on shareAll" at Angular Architects: https://www.angulararchitects.io/en/aktuelles/whats-new-in-angular-architects-module-federation-14-3/
Thanks for all the help, much appreciated.