I want to buy a range extender but I do not want to have to do any installations on my existing router and do not need the OneMesh system - so I think I should not buy a OneMesh range extender. Is that correct or can you use a OneMesh range extender without actually using the OneMesh capabilities?

If that's correct, is there a definitive list of what is and is not OneMesh. For example there is no mention of OneMesh on the product page for this https://www.tp-link.com/uk/home-networking/range-extender/re650/ BUT the picture of the box says OneMesh on it?