I feel this should be possible especially if you work with isolate layer but even without, being able to edit the timeline gets annoying if you need to toggle the layer to be visible to be able to move frames. I'd rather this restriction was removed, maybe as an option if needed.
Git commit 7c0211e21012cf3d914c318a4539e633d900c759 by Eoin O'Neill. Committed on 30/04/2021 at 03:09. Pushed by eoinoneill into branch 'master'. KisAnimTimeline: Added isolation exception to layer's frame editability. M +7 -1 plugins/dockers/animation/KisAnimTimelineFramesModel.cpp https://invent.kde.org/graphics/krita/commit/7c0211e21012cf3d914c318a4539e633d900c759