ch9326‑test.py 

CH9326DS1.PDF 

UART to USB 1.1 HID
I first learned about this chip from video https://youtu.be/jJoD2ioJPP0 
chip on sop16 breakout
Connecting only VCC, GND USB‑ and USB+ to target and UART RX, TG and GND to USB serial works without any additional components.

[2022258.670458] usb 1-5.2.3: new full-speed USB device number 41 using ehci-pci
[2022258.780644] usb 1-5.2.3: New USB device found, idVendor=1a86, idProduct=e010, bcdDevice=34.00
[2022258.780657] usb 1-5.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[2022258.780663] usb 1-5.2.3: Product: HID To Serial
[2022258.780669] usb 1-5.2.3: Manufacturer: WCH.CN 4
[2022258.780674] usb 1-5.2.3: SerialNumber: 12345678
[2022258.791635] hid-generic 0003:1A86:E010.000D: hiddev3,hidraw3: USB HID v1.00 Device [WCH.CN 4 HID To Serial] on usb-0000:00:1a.7-5.2.3/input0

I does not create normal /dev/input device under Linux, but sending chars over serial at 9600 8n1 does produce output at /dev/hidraw3 device
dpavlin@x200:~$ microcom -s 9600 -p /dev/ttyUSB0

lsusb
dpavlin@x200:~$ sudo lsusb -d 1A86:E010 -v

Bus 001 Device 041: ID 1a86:e010 QinHeng Electronics
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x1a86 QinHeng Electronics
  idProduct          0xe010
  bcdDevice           34.00
  iManufacturer           1 WCH.CN 4
  iProduct                2 HID To Serial
  iSerial                 3 12345678
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0029
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          4 (error)
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      37
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0020  1x 32 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0020  1x 32 bytes
        bInterval               1
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
  (Bus Powered)