UX improvements for "Suggestion changes" feature

I've found the button "Suggest changes" not so discoverable by a new user. The button is small, the icon look doesn't advertise the idea behind it.

GitLab:

Github:

At Github, the action buttons a grouped by their purpose (text style, content manipulation, lists etc.) and the "Insert suggestion" button is advertised by making it outstanding and placing it first on the list.

I believe we can follow the same path or think of other ways of advertising this feature and making it more obvious to use.