While we do show the 'Page Title' and 'URL Segment' when editing a existing page these values are not used within the display of the page tree. Instead there is an internal page "Name" which is not shown anywhere except the page tree and the only way to adjust currently would be to delete the entire page and make a new one.

We may consider this in the future based on impact and business needs of our customers, but this is not a small effort change and will require prioritization with other roadmap items.

Please continue to share feedback and impact so that we may consider this in the future.