If I were the author I wouldn't bother implementing the option for that reason. I was curious whether it was due to a genuine accessibility reason, like using a device other than a mouse that makes it really hard to adjust.
<svg class="cf-ic" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><polygon points="21 4 3 4 10 12.4 10 19 14 21 14 12.4 21 4"/></svg>
<span class="cf-tx">Invert camera</span>
<kbd class="cf-key">I</kbd>