Got a custom P+L report. However, when I change subsidiary, the report layout reverts to the default one until I change back to the original subsidiary. Any thoughts on how to get the custom report to apply to all subsidiaries?

I was able to do this by changing the Subsidiary Context, Refreshing my Report and then hitting Customize. Once in Customization I selected my desired Layout and Saved. After doing this, that particular Subsidiary used that Layout moving forward. Repeat for every Subsidiary you want to use the Layout.