I've been using pages to host Hugo sites, but am looking into workers for a new site. In my Pages site, I was using a bash script to build differently for "main" versus "staging", and Pages handled automatically mapping the <branch-name>.pages-name.pages.dev URL for preview builds on branches other than main.
If i'm reading the docs correctly, Workers is supposed to also automate preview URLs, but i'm seeing non-main branches trigger changes to the <worker>.<user-name>.workers.dev URL same as a check-in to main. What am I missing?