You need to get known for doing L&P enhancements ... There is huge call for it, but not if you don't do it. Anything you add to your menu will add eventually to your client base.
We still do more L&P than any other service in the salon because we are known for it and we weren't as silly as so many have been, to change every client over to Shellac just because we had taken it on as a new system in the salon!!
There are plenty of women who need their enhancements! NEED them ... We are prescriptive and do what the client needs!
Those who only offer a UV polish are not going to get asked much for enhancements because they are not nail technicians ... But eventually whenever they do they will be turning people away to other salons because they can't do it.
So if you have the chance then go for it .... It's the best fun in the world to an artist. Then market it and offer it to the people for whom it is suitable ... Not all your Shellac clients! Build that new clientele you want and don't steal clients from the ones you already have.