As for the pages which can't be edited with Elementor, please, pay attention that several pages cannot be edited with any page builders as they are dynamic:
-Activate
-Activity
-Blog Classic
-Blog Grid
-Blog List
-Blog Masonry
-Complete Registration
-Groups
-Login
-Members
-Password Reset
-Register
-Shop
On these pages, you can only customize its elements at the bottom of the page https://prnt.sc/ssbhmr because the content for these pages generates automatically.
For example, you can add or edit blog pages under Blog Posts > All posts https://prnt.sc/ssbl9k, and they will be added automatically to your blog page (classic, grid, masonry, or list). The blog style you can choose under appearance > Theme settings > Blog https://prnt.sc/ssbmft.
As for social networks pages (activity, login, register, groups, members, etc.), you can adjust this content under Youzify Panel, as it comes from this plugin.
The same with shopping pages, every shopping item can be edited within the WooCommerce plugin.