So, I’ve been using the Nothing Ears since the Gen 1 [Ear (1)] and I was pretty upset with the same problem. Down the line I had to get it replaced because of an issue with one of the earbuds but before doing that I had ordered a transparent skin from GadgetShieldz. It worked totally fine after that.
Down the line I switched to Ear(2) and putting on the transparent skin was the first thing I did. But because of the extremely precise cutouts it was hard to align and make the entire skin stick to the case.
So, later I switched to a hard transparent poly carbonate case, which fits pretty snug and also makes the earbuds a bit more rugged while maintaining the transparent aesthetics.