For me, it shows:
![Screenshot_2022-11-12_16-00-38](/uploads/fcc00ebf1944c6b7f67efcab68823835/Screenshot_2022-11-12_16-00-38.png)
348 changes rather than just the things I've changed for this MR specifically. Which makes it almost impossible to diff between versions, but maybe I'm not using the Gitlab UI properly.