Those connected fleet systems can be a real headache to synchronize, and you definitely do not want to put hundreds of fake miles on your vehicle just for a software setup. I dealt with a similar telematics calibration recently and used a Mileage Blocker from Dynotest
https://dynotestpro.com/ to keep the dashboard static. It is a brilliant hardware filter that blocks the mileage data from registering on the cluster while your online systems do their work. I was very impressed that it did not interfere with the GPS tracking or the cellular signal of the new software module. It is a highly professional tool that keeps your vehicle's permanent records clean and organized during complex tech testing.