The kernel logs didn't identify that it found anything on this device
Oct 03 19:38:38 LibreELEC kernel: usb 1-2: new high-speed USB device number 2 using xhci_hcd
I would expect to see kernel: usb 1-2: New USB device found, idVendor=2013, idProduct=-4062, bcdDevice=##
Do you see anything with find /dev/dvb
If yes the do the journalctl | paste again.
Note the NextPVR server does the /dev/dvb scan on startup and if it is slow to be detected you would need to rescan to find the device. There are also scripts on the NextPVR forum showing how to have the server startup delayed.
Since the device is new to the kernel I don't know how Hauppauge can say LE should have the drivers.
Martin