No loudspeaker on a fresh install

Just installed Endless on a new computer, an Avell b.on 145, which AFAICT is a rebranded model made by Intel. No sound comes off the loudspeakers, eg when testing the sound on GNOME Settings, even though the same test produces sound from the cabled earphones or from bluetooth headphones when I connect them. I’m calling the computer’s seller next business day, but meanwhile is there anything I should be looking at software-side? Thanks!

Endless OS 6.0.4

$ lspci -vv -s 00:1f.3
00:1f.3 Audio device: Intel Corporation Alder Lake PCH-P High Definition Audio Controller (rev 01) (prog-if 80)
	DeviceName: Onboard - Sound
	Subsystem: Emdoor Digital Technology Co., Ltd Alder Lake PCH-P High Definition Audio Controller
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 32, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 144
	Region 0: Memory at 6001148000 (64-bit, non-prefetchable) [size=16K]
	Region 4: Memory at 6001000000 (64-bit, non-prefetchable) [size=1M]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_sof_pci_intel_tgl