This is my custom parameters path to add for dynamic link:

let parameters = "action=ORDER&codeId=1&goId=2"

This is how I create manual Dynamic Link:
let domain = “joytst.page.link”
let string = “https://(domain)/?link=https://(domain)/?(parameters)”

and the output for shorten URL is:

"https://joytst.page.link/syjd9GjRH3SYCXFH7"

Then I am trying to create long url back from just shortened, and I got:

"https://joytst.page.link/?action=ORDER"

Where are codeId=1&goId=2 parameters?