"Non-free driver blobs" in the librephone context means anything needed to drive the hardware. i.e. kernel drivers, HAL modules, firmware images, user-space vendor libs, etc.
But sure, librem5 probably has most of that already.
Because they aren’t focusing on a specific piece of hardware… I’m really not sure what you are expecting? The librephone project to be focused on librem5 instead of the hardware used in thousands of other devices?
But sure, librem5 probably has most of that already.