nvidia-audio-card,routing =
"CVB-RT Headphone Jack", "CVB-RT HPOL",
"CVB-RT Headphone Jack", "CVB-RT HPOR",
"CVB-RT IN1P", "CVB-RT Mic Jack",
"CVB-RT IN2P", "CVB-RT Mic Jack",
"CVB-RT Int Spk", "CVB-RT SPOLP",
"CVB-RT Int Spk", "CVB-RT SPORP",
"CVB-RT DMIC1", "CVB-RT Int Mic",
"CVB-RT DMIC2", "CVB-RT Int Mic";
HPOL, HPOR, SPOLP, SPORP are output dapm widgets and IN1P, IN2P, DMIC1, DMIC2 are input dapm widgets as per RT5640 codec.
Please update them according to es8388 codec dapm widgets.
For reference,
The audio codec ES8388 does not work on Jetson nano - #10 by mkumard. Please note DT nodes format is different there as its on older release.