Welcome to the Lightroom Community. I'll help you figure this out. What version of Lightroom mobile & iOS are you working on?
I have some understanding of what you said; please correct me If I am wrong. Share a screenshot of the Copy settings screen to showcase what edits are getting copied. If you export an image as a DNG, it gets exported with the last edit.
If this image is imported by any other user, they can choose to create a preset based off the edits in this image.
Let me know if this helps.