That is still salvageable. I see lower fade, a bit of tip burn, and small pots that are probably swinging wet/dry and salt strength faster than you’d expect.

If that tablespoon per gallon was Grow Big or Tiger Bloom, that’s pretty hot. Big Bloom is different, but either way with a charged soil mix I’d pause the bottled feed for a watering and read the pot. Plain pH’d water around 6.3-6.5, water slow, get a little runoff if you can, and check pH/ppm. If runoff ppm is high, don’t feed again yet. If it’s low and pH is in range, come back with a light bloom feed, quarter to half strength.

The yellow leaves at the bottom won’t repair, just remove them once they’re fully spent. Don’t chase them with more nitrogen this late, especially with buds already formed. Watch the newest growth and sugar leaves. If those stop burning and the flowers keep stacking, the grow is not lost.