The focus of your question is to change the column width property of one of the views, the other default views will also be changed, right?
You need to remove that column in the default view (new specific views will not have the column whose properties need to be modified), then re-add it to the default view and the specific view that needs to be modified and then change the properties on it. Or add a new column to modify directly in a specific view, because only the attribute modification of the column specific to the view will not be synchronized with other views. In fact, these two are the same, and they all have the same problem that they need to create a new column name to represent the same column (they will encounter the problem of the same name) to display in different views. I think this behavior is necessary.
See my comparison below. In the All Items view, the nubb column changes the width property, and in the all view, the nub column does not change, although the nub column and the nubb column are represented as the same column.
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