Add Image > Expand/Resize Canvas to Fit All Content

experience after GIMP:

there is no “Fit Canvas to Layers” function that takes one click. You do it in a few steps:
1

there is no “Crop to Content” function at all:
crop

These things in GIMP for me are routine things that I don’t get distracted by: I do it quickly, without looking, without thinking. In Krita, it is more complicated.

It makes no sense to suggest “just stay in GIMP”. On the GIMP forum, I also write about more successful Krita solutions that should be borrowed.

thank you