Device visible in aplay -L but not listed in audio GUI

aplay -L lists many entries for USB sound card but in audio gui I can only choose only handful of entries, including only two for the external audio card.

I want to set surround51:CARD=Pro,DEV=0. but that’s not visible in gui.

Is there a config file where I can set above device to bypass incorrect gui?

Below relevant snippet from CoreELEC Audio Audit script:

null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=AMLM8AUDIO
    AML-M8AUDIO,
    Default Audio Device
sysdefault:CARD=AMLM8AUDIO
    AML-M8AUDIO,
    Default Audio Device
 
    AML-M8AUDIO,
    HDMI Audio Output
default:CARD=Pro
    SB X-Fi Surround 5.1 Pro, USB Audio
    Default Audio Device
sysdefault:CARD=Pro
    SB X-Fi Surround 5.1 Pro, USB Audio
    Default Audio Device
front:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    Front speakers
surround21:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Pro,DEV=0
    SB X-Fi Surround 5.1 Pro, USB Audio
    IEC958 (S/PDIF) Digital Audio Output

VERSION=“9.2.1”