No, and not only do I find it strange, I usually see it as one of those things people do that absolutely no one around them cares about, yet they still brag about it. There are exceptions, of course. If you take a trip to Japan and get authentic ramen, sure, share that. If you make some wild cake design for a once‑in‑a‑lifetime event, that makes sense too. But nobody needs an update when someone eats chicken and rice for the fourth time this week.
That said, I’ll play devil’s advocate. A lot of people mix healthier eating with a bit of showing off on social media. As long as they’re not belittling anyone who isn’t eating the same way and they’re just posting for their own satisfaction, there’s really no harm in it. If the “worst” thing someone is doing is eating healthier and sharing a picture, I can scroll past without being bothered.