Here is the link for the mount I helped developed. Use this code FULLSEND for a 10% discount. I am not affiliated with this site.
https://mohawkdesignsoffroad.com/products/cybertruck-nmo-antenna-mount-bracket
There has to be a way to mount radios under the screen. Take a look at this. Not a solution but clearly other people are thinking there should be away to mount other items under the screen. I would love to mount a CB radio under the screen in the same position that you are proposing the Ham...
I was thinking of mounting ski racks (very low profile) to cross bars that are utilizing the L-Tracks so that I could keep skis/snowboards (hanging with bindings down) underneath the Tonneau cover, with the cover closed. Has anyone created L-Track Cross Bars?
https://www.cybertruckownersclub.com/forum/threads/lightbar-accessory-spotted-on-cybertruck-%F0%9F%92%A1.9445/post-216761
Per the thread link above the Lightbar easter egg appears to attach at the top of the windshield. How could we leverage how it attaches for mounting a ham or cb antenna?
From Testing down in Baja, looks like they mounted the antenna up at the top next to mounting a starling receiving antenna. Maybe the Antenna is suctioned onto the glass roof? On the inside, either a CB or Ham is mounted on the underside of the dash right under the Center Display Screen...