Two years back I realised that I am being very forgetful so I reached out to a professional for advice. I was advised to play memory games on Lumosity (https://www.lumosity.com/en/) along with a few other tips (like : record your todos in phone but try remembering that list from mind). I did these exercises for a few months (~3 months) with discipline. I was surprised that it really had an impact on me. So when the article mentioned that it is a skill which could be developed, I can second that idea.