Welcome to what Instagram used to be: a chronological feed of spontaneous shots updated sporadically.
Some photos are heavily optimized and exported for HDR displays with P3 color space (right now, the easiest way to see them as intended is a Chromium-based browser on a recent Pro Mac/Apple Display or Pixel/Samsung phone.)
Those pictures may show a stark difference when falling back to SDR. Recent photos have been taken with a Ricoh GR IIIx because I like to regain focus using single-task devices.