Logitech H340 USB headset not playing, not showing in PulseAudio, is showing in advanced settings

This issue has been noted elsewhere:

https://www.google.com/search?newwindow=1&client=firefox-b-d&sxsrf=ALeKk03nrHULYoXwlbyHcOlIIsDdvvYgag%3A1602545171816&ei=E-aEX--6MZmR4-EPhLma0Ao&q=logitech+h340+linux+driver&oq=logitech+h340+linux+driver&gs_lcp=CgZwc3ktYWIQAzIECAAQRzIECAAQRzIECAAQRzIECAAQRzIECAAQRzIECAAQRzIECAAQRzIECAAQR1AAWABgjPUXaABwAngAgAEAiAEAkgEAmAEAoAECqgEHZ3dzLXdpesgBCMABAQ&sclient=psy-ab&ved=0ahUKEwivkM_9mbDsAhWZyDgGHYScBqoQ4dUDCAw&uact=5

It shows in devices:

I downloaded solaar but it doesn’t show.

As another related issue, I plug in my earphones and it doesn’t record sound.

solaar can only detect some Logitech USB wired headsets

suggest you try moving headset to a USB 2.0 socket (EHCI)
it may work better without any conflict with devices sharing USB 3.0 controller (XHCI)

please post system information

inxi -Fazy

and Pulseaudio card information

pacmd list-cards
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