Hi
If you still need help with this, can you please add more information?
The menu tab did not hide page titles on pages. It only managed menus, nothing else.
In block themes (Not only this theme) the menus are managed by the navigation block and the navigation screen in the Site Editor.
To remove the title block from pages, you need to edit the template for pages.
You can find that template if you go to Appearance > Editor > Templates.
Then find and delete title block and save the template.
It is possible for pages to use other, more custom templates. If you are not sure what template a specific page is using, edit that page, then open the page sidebar and locate the “Template”. There will be a name of a template. Click on that name and you will see an option to edit the template.
Remember that when you save the template, the title you removed will be removed from all pages that used that template.