I had several friends who do that on social media, I just see their post but never comment on what they post.
One I remember when she bought a brand new car, she show it on social media,. She even post all the process when she went to the auto dealer shop to buy it, Really? She post photos of her shaking hands wit the auto agent, she post a video of her driving her new car out of the agency. Really? And of course she got many LIKES from many people and her same sole answer to all who comment on her post was "Thanks". Did she really post it for her just to say "Thanks?
Then another time this same lady post another set of photos when she was training to become a certified scuba diver, because her son already is a certified scuba diver, she wanted to do the same.
Another friend I have the same: Today she posted a photo and she said "Started a new project" and the photo was of her running.
These examples and other more sometimes it makes me wonder the real real reason why this people do it.
The best things happen when you dont share it to the public in social media, it can backfire you.