Despite its designation, the ThinkPad T15g is a full-fledged mobile workstation and shares the chassis construction with the ThinkPad P15. The design was refreshed, but the device still appears pretty outdated due to massive bezels. There is also an issue with the keyboard and coil whine is a problem as well.
https://www.notebookcheck.net/Lenovo-s-mobile-workstation-T15g-appears-a-bit-outdated.526419.0.html