I had no problem with Scheduled Tasks and events either. I have custom providers such as CsutomShoppingCartInfoProvider, CustomShippingOptionProvider. When I try to interact with Shipping Methods on the .NetCore Live website especially when trying to calculate the Shipping Cost, then the site throws the exception and complains about cannot find the custom module assemblies.
So, If I convert the .NET 4.8 Class Library to .NETStandars2.0 it could be uses and referenced both on the CMSApPp and the .NEtCore app as well, right?