All British English pages (duplicates of the default English pages) are missing from the page list. 53 however appear as existing in the abbreviated area above the page list. I have already used the Clear Cache in WPML feature. Are there any other potential fix options?
In this case, I kindly ask you to share the access credentials to the site in your next message, which I have set private. This will allow me to reproduce the issue and double-check the WPML configuration.
Confirm you have created a full site backup that you can restore if necessary.