To me one out of a few things I had to develop myself was managing deletion on one end of the system to propagate in the other side of the integration depending on linked records and integration direction.

Because I do it where it makes sense in my custom tables, I would probably recommend if it gets implemented to have a tickmark in the integration table mapping "Propagate delete on linked records").

The only question is now if you do implement this feature, if it can be done also depending on direction. For instance if your integration is from BC to Field Service(crm)/Dataverse(Dv), then clear the Field service/DV linked record if the one in BC is deleted, if it is in the other direction then if you remove the one from CRM/DV, then clear it in BC, if the integration is both ways, then clear it in the other system disregarding where the delete happens first. Of course all this should happen if the new flag is on at integration table mapping level.