Yes, 17% of these users are using the 4.7" screen, which is what's in the 6, 6S, 7, and 8.
The iPhone X and XS have a larger screen dimension in inches but the physical size of the phone is roughly the same thanks to a better screen to body ratio.
When we see 5 and 6 inch phones, but with higher screen to body ratio, some of us seem to mistake this with a phone that is too large to hold.
So what I'm saying is, no, Apple isn't deprecating the 4.7" screen size. Not in any way shape or form. The iPhone 6, 6 Plus, and 5S are being dropped for architectural and performance reasons. The iPod touch just received a refresh and should indicate that Apple will still support the 4" screen size for at least some amount of time.
My final piece of advice is to just get a PopSocket, it makes your phone way easier for single hand usage. There's no need to be stuck using a phone as tiny as the iPhone SE. Customers do not prefer it, it was not popular, otherwise we would still see that form factor.