Finally, it is working. Originally I tried it with VSCode and PlatformIO with the latest u8g2 display library, but it dod not work. Then I moved the project to Arduino IDE with u8g2@2.26.14, and it works now!
@ajb2k3, Yes, it has the MPU9250. I ordered the last 3pcs from a local retailer. Now I check other stores too :)