A subject doesn't stand out because it's bright. It stands out because nothing around it is competing.
So the instinct to reach for the saturation slider — to make the bird pop — quietly backfires: it turns up the background too. Here's the same hummingbird, and the one decision that makes it step off the frame instead of sinking into it.
Same frame. Only the background changes.

This is it. The background is dimmed and drained, the bird untouched — and now it's the only thing lit up in the frame.
The instinct is to make the subject louder. The move is to make everything else quieter. Reach for the background, not the vibrance slider.
Two levers separate a subject from its background: luminance and colour. Dim the background and drain its colour, and the subject steps forward on its own.
Every tweak you make to the subject to help it pop is one the viewer can feel. The cleanest separation never touches the subject at all.
Tap to do what everyone does — boost the saturation instead.
"Cranking the saturation doesn't lift the subject. It turns up the volume on everything competing with it."
Tap each mark.

If the subject suddenly looked lit from within — you didn't light it. You cleared away everything that was dimming it.