Max. 50 is also a too many for the recent posts section, if possible just decrease the number of recent posts. Showing the whole post in recent post category section is not a good idea for your visitor and also it take lots of time to load your post on your site if you show all of your posts in recent posts section.
Basically you cannot add “More Pages” button. As this is the new feature for the Theme so you need to hire a developer to customize the code according to your need.
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