I purchased a cheap Vevor DH that said it adjusted for altitude and never adjusted. I did see it once go from 0 meters to 1 meter and I live at 8000ft (2400m). The DH would run rich and then overheat, throw a error code and shut down. The DH came with a 3-button controller. I did end up replacing the controller (went with 5-button) along with control board and it came with a remote. No bluetooth connection and was purchased via Alibaba so no instructions. The new controller does allow for manual tuning and I have done that and the DH now works at altitude without shutting down. That was a year ago when I did all of this and certain the same product won't be available but you should be able to find something on there.

Here are some links that could help locate a tunable controller along with how to tune:

https://www.stokeloafvan.com/blog-1/winter-van-life-chinese-diesel-heater-cdh-elevation-adjustment

https://www.vanlifeuksurvivorsguide.co.uk/post/chinese-diesel-heater-controller-motherboard-remote-control-guide

https://www.reddit.com/r/vandwellers/comments/18x0th9/diesel_heater_for_use_at_elevation/