In the Tab Groups pane on mobile, at the bottom it shows you a menu item to select a synced device. From there you are presented a list of open windows in Orion on that device.
The suggstion is to show a list of all the tabs, with their window as a header, instead of having them hidden away behind the menu item as is the current implementation.
This suggestion will make it faster and easier to find a given tab, because in the current implementation, the user has no way of knowing which window the tab they are looking for is hidden in. They will need to click through each window one by onein order to find it.
Most users have more tabs than windows, so this pane is also likely to usually be extremely sparse, only having a small number of windows in it.
With the current suggestion, the user will be able to find the tab they want with much less clicking and making more effective use of screen real-estate.