Transfer template created in one vsphere using vsphere-iso to a different vsphere

Hello! I’m here after days of scouring the internet for documentation and examples. Here’s my issue - I have a gorgeous pipeline creating centos7/el8/el9 templates using the vsphere-iso builder. This is occurring on our dev vsphere instance. I need packer to then copy those templates to a completely separate prod vsphere instance. I swear I’ve tried every combo I can find of post-processors with zero luck. Please halp.