I want to know if I can manipulate different CRD's in my Job/CronJob in kubernetes. The documentation only show's a pod template, but I want to use different objects.
No, Kubernetes does not support any other resource but pods, as these are the only resources that run containers in Kubernetes and Kubernetes, will need to spin up a Pod in order to run your task
If you want to setup a CronJob to use your CRD's then you might need to create your own CronJob spec, a very good example of this would be the Kubebuilder tutorial, they rebuild the whole CronJob