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You can try installing the generic drivers for the Intel® UHD Graphics 620, for example, you can test the latest version 188.8.131.5241 on the system,
Please keep in mind that Microsoft surface pro systems have highly customized drivers form the Original Equipment Manufacturer (OEM) and if the system requires a newer release, we recommend contacting Microsoft to request this.
NOTE: if you have errors while completing the update you can follow the steps on Intel® HD Graphics Installation Error: This Installation Package is Not Supported by this Processor ....
Intel Customer Support Technician