The phrase "natural extension" means something that naturally continues or adds on to what already exists. It's like a logical progression or a next step that makes sense. Full definition
They are not natural extensions of families, and their teachers and administrators should not be expected to act as if they were members of a family. (educationnext.org)
Therefore, badges, scores, and leaderboards have become natural extensions for better workplace performance. (elearningindustry.com)
I can't believe how natural your extensions look — I would never have guessed! (kiercouture.com)