Of course the boot image was taken from my device, which
you taught me last year.

It was rooted correctly. The device works perfectly fine otherwise.
I can confidently say that the driver is present and processing audio data.
I tried to change tinymix switches, but no luck.
Code:
53* * * BOOL* * 1* * * *DEC0_BCS Switch* * * * * * * * * * * * * Off
102* * *BOOL* * 1* * * *RX_COMP1 Switch* * * * * * * * * * * * * Off
103* * *BOOL* * 1* * * *RX_COMP2 Switch* * * * * * * * * * * * * Off
154* * *BOOL* * 1* * * *SLIMBUS_DL_HL Switch* * * * * * * * * * *Off
155* * *BOOL* * 1* * * *SLIMBUS1_DL_HL Switch* * * * * * * * * * Off
156* * *BOOL* * 1* * * *SLIMBUS3_DL_HL Switch* * * * * * * * * * Off
157* * *BOOL* * 1* * * *SLIMBUS4_DL_HL Switch* * * * * * * * * * Off
158* * *BOOL* * 1* * * *SLIMBUS6_DL_HL Switch* * * * * * * * * * Off
159* * *BOOL* * 1* * * *PCM_RX_DL_HL Switch* * * * * * * * * * * Off
160* * *BOOL* * 1* * * *SCO_SLIM7_DL_HL Switch* * * * * * * * * *Off
161* * *BOOL* * 1* * * *HFP_INT_UL_HL Switch* * * * * * * * * * *Off
162* * *BOOL* * 1* * * *HFP_SLIM7_UL_HL Switch* * * * * * * * * *Off
163* * *BOOL* * 1* * * *USB_DL_HL Switch* * * * * * * * * * * * *Off
164* * *BOOL* * 1* * * *A2DP_SLIM7_UL_HL Switch* * * * * * * * * Off
165* * *BOOL* * 1* * * *WSA_CDC_DMA_RX_0_DL_HL Switch* * * * * * Off
166* * *BOOL* * 1* * * *RX_CDC_DMA_RX_0_DL_HL Switch* * * * * * *Off
167* * *BOOL* * 1* * * *RX_CDC_DMA_RX_1_DL_HL Switch* * * * * * *Off
1527* * BOOL* * 1* * * *HPHL_COMP Switch* * * * * * * * * * * * *Off
1528* * BOOL* * 1* * * *HPHR_COMP Switch* * * * * * * * * * * * *Off
1529* * BOOL* * 1* * * *ONYX_FSA2275_SEL Switch* * * * * * * * * Off
1530* * BOOL* * 1* * * *ONYX_FSA2275_MUTE Switch* * * * * * * * *Off
1531* * BOOL* * 1* * * *ONYX_AW_SpkrL_MODE Switch* * * * * * * * Off
1532* * BOOL* * 1* * * *ONYX_AW_SpkrR_MODE Switch* * * * * * * * Off
2492* * BOOL* * 1* * * *ADC1_MIXER Switch* * * * * * * * * * * * Off
2493* * BOOL* * 1* * * *ADC2_MIXER Switch* * * * * * * * * * * * Off
2495* * BOOL* * 1* * * *EAR_RDAC Switch* * * * * * * * * * * * * Off
2496* * BOOL* * 1* * * *AUX_RDAC Switch* * * * * * * * * * * * * Off
2497* * BOOL* * 1* * * *HPHL_RDAC Switch* * * * * * * * * * * * *Off
2498* * BOOL* * 1* * * *HPHR_RDAC Switch* * * * * * * * * * * * *Off
I tried to change 53, 154, 164, 166-167, 1527-1532, 2497-2498.
If you think something will work, I will test it. Now, I even learned how to make Magisk modules.