Good morning,
I encounter a 404 error on the pages of the collection elements. I can modify them in the CMS (and preview them), but when I consult them via the published link, I get a 404 error indicating “The requested resource cannot be found”.
I also think this might be the issue. Please try to make a small change, save and re-publish. Maybe you have to try this a few times. If that does not help, you need to either contact cPanel directly or your provider needs to contact cPanel. They need to check on the publishing process in that case.
This solution worked for me in the past. I sent my host an email, and they confirmed that there was a glitch between them and cPanel. The bug was fixed quickly.
I hope this works.