Bluetooth not found but service runs no default controller

That url leads at this moment to a firmware version

redpine_91x: RSI FW Version        :  0000.2.1.0.0502

This version did not work with the actual modul

root@pureos:~# modinfo redpine_91x | grep version
version:        RS9116.NB0.NL.GNU.LNX.OSD.2.0.0.0024
srcversion:     0876F9C4F36E3CB6E9B44D2
vermagic:       5.16.0-1-librem5 SMP preempt mod_unload modversions aarch64

To get a firmware that works with this module I had to look for the older 1.2 version which I found here:

https://source.puri.sm/angus.ainslie/firmware-rs9116-nonfree/-/raw/upstream/1.2.20/Firmware/RS9116_NLINK_WLAN_BT_IMAGE.rps

The older version did work somehow and I have been able to connect a Cherry MW 8 advanced mouse using bluetooth LE. But the mouse has been quiet laggy and there have been a lot of error messages by phoc

Mär 31 14:30:05 pureos phoc[693]: [types/wlr_output.c:1258] Failed to pick cursor format
Mär 31 14:30:05 pureos phoc[693]: [types/wlr_output.c:1343] Failed to render cursor buffer

Does anybody know how to connect a/that(?!) bluetooth LE mouse to the Librem5?