CPU + memory usage missing from SM Studio notebook toolbar

I work in SM Studio, and I do not understand why CPU and memory usage do not appear in the notebook toolbar. These metrics should be there, at least given this description:

https://docs.amazonaws.cn/en_us/sagemaker/latest/dg/notebooks-menu.html

When I open a notebook in SM Studio, I see the same toolbar but without CPU and memory usage listed. Moreover, I see 'cluster' before the kernel's name in my toolbar.

Has anyone experienced sth similar? I assume an alternative for me would be to use CloudWatch.