Is there a way to sort these pages by folder? Site pages in site contents is looking a little cluttered. Not looking to add more columns. Its possible in a document library just not sure about site pages.
It is possible but you have to enable folders in advanced settings in the library settings.
Go to library in question > Library Settings > Advanced settings > Set 'Make "New Folder" command available?' to Yes and then click Ok.
You should now be able to create folders in the site pages library.
The idea behind a publishing site is that you create subsites for sections or areas of your site. For example About Us, Products, Services, News. Since each sub site will have its own Pages library, you would then get natural page organization that way.
You can create folders like you mentioned, but it can affect your site navigation depending on if you are using managed navigation or structural navigation. The latter can't read pages in sub folders and populate the navigation accordingly.
Just a heads up in case that would affect your site.