URL redirect works if you are redirecting from a 404 page. I think your current page is working and valid, you may not get redirected to your desired page.
Can you please check if your current source page is available or not?
well lets see… I definitely don’t have any pages available with the address /?id=tests or /?id=coaster1.
without redirecting, they will automatically be sent to / (home).
When setting up the www.calexo.co/?id=test redirect, everything works perfectly. This is why I don’t understand why the second one is still going to /.