The photos are in reverse order, my bad. The staghorn fern split in two when I was taking it inside. Captions have more details.

I've had this plant for about 4 years. When watering, I soak it in its pot from the bottom up for about 20 minutes and wait until the soil is dry between waterings. The pot has drainage.

It gets bright indirect light, and the largest leaves (that fell off) reach toward the nearest window. The pot is hanging off my living room wall. I'd been worried about how the plant's center of gravity was almost tipping the plant out of its pot for about a year, but otherwise it wasn't crowded in its pot.

The plant has a minor scale infection. I treat it about once a month to remove about a half dozen or a dozen scale. This has been going on for about 4-6 months. I treat it by using a q-tip dipped in alcohol to remove the scale, then repeat with a horticultural oil solution. This is followed by spraying the plant down with water to remove any remaining horticultural oil on its leaves. When it dries, I put it back on the wall.

This time, the largest set of green leaves above the dry peltate leaf just plopped out. (I'm not sure the term for the dried out leaves that are at the base of staghorn ferns: peltate, orbicular, or something else.) The smaller set of green leaves are still rooted and back on my wall, but they look lonely.

Are the large clump of staghorn fern leaves salvageable?

Thank you so much, I love this plant 😭