AsNoriuanswered grow question a year ago If they burned like this its not only ph, you put too low ph and feed together, i saw your other question and top foto, honestly you are fucked.
You will get some result, but it will be pitty of what if ....
First return to wet/dry , she has to start drinking. Only 6.3 ph water when needed and as much as needed.
I dont believe in flush in soil, never had good result as correction tool, it works in hydro or coco, not here.
With second watering add 0.25-0.5 ml of CalMag to water.
When she will dry out twice pot, give her last plain watering, only then try to return to feeding schedule if it will be any time left for that.
She will develop way weaker and slower, so don't screw up more.