Or, maybe there isn't much to do manually during this phase, and for the little things there are some classic controls.
Also, judging from the photos, they seem to have their button covers supported by the frame. In 2003, there was an incident when a cosmonaut inadvertently fired RCS thrusters on the Soyuz attached to the station, simultaneously pushing several buttons with his foot while loading the spacecraft with cargo to be returned to Earth, crushing the protective caps that were pressing against the (relatively flimsy) case. The thrusters fired for quite some time until a ground operator noticed it and turned them off remotely. After that, the covers in Soyuz were redesigned to press against the frame. Seems like that incident has been learned from in Crew Dragon as well.
If I remember right, all the important controls are done with buttons and a joystick, while h touch screens are only for informational displays.