I guess. I don't see the point in them. I have done a lot of dumb stuff to my phones and I have NEVER come close to scratching, breaking, or otherwise damaging the camera lenses.
Never used any lens protection other than that provided by the phone case like the Apple silicone, Otterbox Defender or Simply Carbon Fiber ARMOR series.
Dumb idea. No worth it. Just more money for these manufacturers to make. Affects picture quality. I’ve never had the need or had the reasons to have these on my iPhones.