For anyone that's interested, my fork over at https://github.com/PascalHonegger/ng-datatable supports Angular 11 and ivy. The build pipeline now uses the Angular CLI and should allow for upgrades to future Angular versions as well.
If you still want to use (or maybe even improve) this project, you're welcome to use the fork or submit a pull request 😉.
This isn't an issue, I still believe it's a nice thing to help people looking into Angular 11 / ivy problems