It looks like for DayPilot Pro version 2020.1.4258+ this can be fixed by creating node_modules/daypilot-pro-angular/daypilot-angular.js file with the following content:
export * from './esm5/daypilot-angular.js';
It will be fixed in the package and included in the next release. You can use this workaround for now or roll back to version 2020.1.4216:
https://javascript.daypilot.org/daypilot-pro-for-javascript-2020-1-4216/
> Instead of js files under daypilot-pro-angular, Im getting two folders: bundles and esm5, each 2 js files under.
This structure is used by version 2020.1.4258 and higher.
> Locally, I have js files directly under daypilot-pro-angular
This structure is used by version 2020.1.4216 and lower.