Given that this is the example code Bootstrap gives for checkboxes in horizontal forms wouldn't it be a Bootstrap problem instead of a Joomla problem?

At the time of this writing the code Bootstrap suggests is the following:

  <div class="row mb-3">
    <div class="col-sm-10 offset-sm-2">
      <div class="form-check">
        <input class="form-check-input" type="checkbox" id="gridCheck1">
        <label class="form-check-label" for="gridCheck1">
          Example checkbox
        </label>
      </div>
    </div>
  </div>

That would assume that joomla is using bs and its rtl correctly - hint we're not

If we were correctly using bootstrap rtl then the class offset-* would be margin-right when in rtl instead of margin-left

Sadly we're still not using it correctly so we have a mess of some overrides that J_M wrote and the rest is missing

Then the problem is how Joomla uses Bootstrap and not the HTML code in the MFA feature. Fix Joomla's use of Bootstrap and the problem corrects itself.

exactly

ok - spent the entire today but #38412