System Information
 Manufacturer: LENOVO
 Product Name: 20S1SBH600
 Version: ThinkPad T14 Gen 1
 Serial Number: PF22JXW6
 UUID: 6f7eec4c‑2d1b‑11b2‑a85c‑8372c07ecbde
 Wake‑up Type: Power Switch
 SKU Number: LENOVO_MT_20S1_BU_Think_FM_ThinkPad T14 Gen 1
 Family: ThinkPad T14 Gen 1
sound
[    4.645562] sof-audio-pci 0000:00:1f.3: hda codecs found, mask 5
[    4.645563] sof-audio-pci 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now
[    4.645566] sof-audio-pci 0000:00:1f.3: DMICs detected in NHLT tables: 2
[    4.645590] sof-audio-pci 0000:00:1f.3: firmware: failed to load intel/sof/sof-cml.ri (-2)
[    4.645591] sof-audio-pci 0000:00:1f.3: Direct firmware load for intel/sof/sof-cml.ri failed with error -2
[    4.645593] sof-audio-pci 0000:00:1f.3: error: request firmware intel/sof/sof-cml.ri failed err: -2
[    4.645593] sof-audio-pci 0000:00:1f.3: error: failed to load DSP firmware -2

firmware is not part of debian yet https://bugs.debian.org/cgi‑bin/bugreport.cgi?bug=960788 
https://github.com/thesofproject/sof‑bin