Heads up folks the same problem as with ADC affects the export of the external GPIO 36/… if you have a I2C MUX you need to set the MUX to 0 before exporting the GPIO …
Errors as per dmesg
[ 408.717839] qup_i2c qup_i2c.0: QUP: I2C status flags :0x1300c8, irq:187 [ 408.725163] qup_i2c qup_i2c.0: I2C slave addr:0x3a not connected [ 408.800335] swimcu_set_fault_mask: 0x4, cnt 6 [ 408.804028] Failed to receive frame from MCU -106 [ 408.808454] Failed to receive a frame -106 [ 408.812849] swimcu_gpio_request: gpio4 error ret=-5 [ 408.817305] gpio-104 (?): gpiod_request: status -5 [ 408.817335] export_store: status -5