When using the Column layout on desktop, the new position of the Unread button anchored to the right of the top bar (the one with the 'select all' button) means that for larger monitors with greater real estate, it's now in a much more inconvenient and further away position compared to when it was above the list of emails.

I believe it was on the top bar, but in line with the rightmost side of the left pane. I saw this as quite a logical place, as you would usually be looking at the list in the left pane when considering applying the unread filter.

An option to change this, or alternatively just an 'unread mail' folder as other ideas have suggested, would be greatly appreciated solutions, as my primary use is for just checking for every unread message across all folders. Thanks for your time!