I have this code to protect rows of my sheet based on a tickmark in Col21.
But the code takes 1 to 3 seconds to execute, so when I check multiple boxes in succession, it skips executing some rows protect script.

How can I make the OnEdit work so that I can protect multiple in quick succession?

function installedOnEdit(e) {
  const sheetName = "請求管理"; // Please set sheet name.
  const checkbox = 21; // In this sample, the checkboxes are put in the column "B".

  const range = e.range;
  const sheet = range.getSheet();
  if (sheet.getSheetName() != sheetName || range.columnStart != checkbox)
    return;
  const p = sheet
    .getProtections(SpreadsheetApp.ProtectionType.RANGE)
    .find((r) => {
      const temp = r.getRange();
      return (
        temp.getRow() == range.rowStart &&
        temp.getColumn() == range.columnStart &&
        temp.getNumColumns() == 21
      );
    });
  if (!p && range.isChecked()) {
    const p = range.offset(0, 0, 1, 21).protect().setWarningOnly(true).setDescription(rownum);
  } else if (p && !range.isChecked()) {
    p.remove();
  }
}