I have an online store and I do a lot of campaigns But I'm having a hard time figuring out how do I know this customer came from which campaign?

Google Analytics gives me general information about the campaign like, conversion rate, page views, revenue...etc

But what I'm looking for if there is any way to find out the reference order numbers, customer names, and phone numbers that came through the given link

I found a solution but later found out that it doesn't work which is:

Add an iframe in the external domain and design it to cover the whole page and contain my website, so users won't even notice they're on a site within a site

Then if the user reaches the checkout page, I extract his information and send it to the database

But then I found it difficult to track users through an iframe

Is there any way to solve my problem in an easy way like tag manager or if there are any tools available that can help me achieve my goal