Samsung’s new Galaxy Z Fold 3 smartphone will automatically disable the cameras on the device if you unlock the bootloader in an attempt to root the device.

According to ianmacd, the cameras will work again if you relock the bootloader before installing a custom ROM. This suggests, as XDA Developers notes, that the lock is likely a ‘software-level obstacle,’ which could likely be addressed in the future. But, as ianmacd says in his post, it’s also possible the cameras could be ‘disabled in other ways, too,’ even if a software workaround is found.

https://www.xda-developers.com/samsung-galaxy-z-fold-3-unlock-bootloader-broken-camera/

It is quote clear where it all is going.

For my opinion any non full open source OS and full open source drivers must be prohibited to exist on either smartphones or computers. And this is only one small requirement, as with present complexity open source means not much by itself.