This is now live. Expand All and Collapse All are saved with your Assortment Plan view, so the grid stays expanded after you reload data or reopen the view. Choose Expand All, then save the view.

Changelog: https://roadmap.toolio.com/changelog/expand-all-is-now-saved-with-your-view-in-assortment-plan

Help Center: https://help.toolio.com/en/articles/5180580-features-and-capabilities-of-the-toolio-grid