EMC and UNECE R10 cerificates

I’ve developed an application for automotive, using the Nextion Intelligent series 7" HMI. In Europe, It is mandatory to obtain the ECE R10 certificate, but the manufacturer (Shenzhen Sonoff Technologies Co.,Ltd.) don’t have this certificate.
Does anybody faced such situation?

You can check how much is to get this by your side, you can include the whole device with cables other controller if any, etc.