The 3 axis gimbal supplied with the H109s is a Zhiyun Tiny 2 gimbal that’s been re-branded.
It is possible to update the gimbals firmware using their Gimbal Tools available from the resources page. The software will allow you to re-calibrate the gimbal and tweak the settings. I have 2 firmware versions on the resources page both with p and s variants.
The p version is for position mode and the s version is for speed mode. In position mode the gimbal will move quickly and return to center after being moved. In speed mode the gimbal will move slower and more smoothly but it won’t return to center. In speed mode the gimbal will rotate 320 degrees in position mode it won’t. The below video gives a good explanation and shows the firmware upgrade process.