When it comes to sheet music height, I too prefer eye level. When playing a digital piano, I usually remove the built in music desk and use a music stand raised to eye level. Grands tend to have the most comfortable music desks.
The music desk height is not always at the optimal position. People come in different shapes an sizes, and everyone needs to make adjustments that work for them. If you have the ability to do something to change this, then do so. It is even more difficult when playing a vertical piano, as the music desk is often too low, too close to they keys, with no option of using a separate stand.
You could use a music stand. There are also tablet mounts for mic stands.