I’ve run into this a few times recently, where closed (or complex) polysurface doesn’t show up in a Ghosted/shaded viewport.
The isolines are present, just not the shading:
Rhino 7 SR14 2022-1-10 (Rhino 7, 7.14.22010.17001, Git hash:master @ d8a2d020be8cb487bfc091316ef32170cfc7eddb)
Windows 10.0.19044 SR0.0 or greater (Physical RAM: 32Gb)
Computer platform: DESKTOP
Standard graphics configuration.
Primary display and OpenGL: NVIDIA GeForce RTX 2080 Ti (NVidia) Memory: 11GB, Driver date: 10-26-2021 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 472.47
> Accelerated graphics device with 4 adapter port(s)
- Windows Main Display attached to adapter port #0
- Secondary monitor attached to adapter port #10