Hi @svante.sandblom and welcome to the Quick Community!
As this is a public user forum, I am unable to access assets that are in your environment. If you would like to show an example I would recommend doing it through the Arena Sandbox (Amazon Arena Sandbox: An embedded instance of the Quick Sight dashboarding capability, within the Amazon Quick Community - What’s New - Amazon Quick Community).
However in this particular case, I think I know what you are experiencing. There have been many user’s in the community that have noted unintended behavior or bugs when working with small multiples. I would recommend editing the range of your y-axis and giving more room to the upper portion of your visual. I was able to recreate your situation where the data labels are cut off and when I increased the max range of the y-axis it fixed it on my end.
Try that out and let me know!