Hi Radar,
Even if the HCI UART failed to initialize, we need to see the logs “Bluetooth: HCI UART driver ver x.x” as it is at the start of the function.
From the logs provided it is hard to find out if the “Initialization timed out” error is due to BT or not. So it will be good if we have the complete logs with BT_DBG(include/net/bluetooth/blutooth.h) enabled.
Also please check if the scripts you use are similar for both the modules. i.e., if the scripts has insert module for all the modules and if the permissions are correct.