https://guide.appliedenergistics.org/1.21/items-blocks-machines/view_cell

These are in base AE2, but disappear and are replaced with card slots in the wireless terminal. These are very helpful for hiding things and making navigating 1000s of items much easier.

Thanks

I don't intend on re-enabling them in ae2wtlib unless ae2 also re-enables them.
That said, it is possible to move them back in view using a resource pack.
I think ae2wtlib might still have the code for them to work correctly in the wireless terminals.