I want to describe my workflow to clarify the feature I'm asking for. I use the Apple Pencil with Goodnotes, and when I double tap the Pencil, it switches to the eraser. After I finish erasing, Goodnotes already has an option to return to the previous tool automatically, which is great.

The issue is that this behavior only works in some situations. I need a dedicated setting that guarantees the following:

After I use the eraser in any way (whether through Auto-Deselect or by activating it with the Apple Pencil gesture), the app will always return to the last writing tool I used. This tool should always be the previous pen or highlighter from the Writing Tools category, no matter what non-writing tool I was using before entering the eraser.
For example, if I was using the Laser tool, then double tapped the Pencil to switch to the eraser, the next tool should return directly to my last pen or highlighter, not back to the non-writing tool.

This would create a much smoother workflow when moving between writing and quick corrections, without any manual tool switching.