There is an iPhone workaround for keeping the original url before it gets changed (i'm using iOS 16.6.1)....
First make sure all open Safari web pages are closed.
on your phone, copy this url to the clipboard:
https://forums.radioreference.com/whats-new/posts
Then go to settings and turn on airplane mode. Then go to Safari address bar and "paste and go" with the copied url. The page load will of course fail and you should see this in the browser window:
View attachment 147951
Then use the share button to add that page to your home screen and you should see this:
View attachment 147952
The url still can't be edited but it is intact as the original that was pasted in Safari. Just edit the name and "Add". Turn airplane mode off.