The SD at my store followed the recommended TL dept. split in the modernization roll-out guide to the letter.
Our store has two DBO’s in infants hardlines - under a GM TL that also owns toys - they share all baby hardline/gondola areas.
Soft lines team stays on the RUG, all clothing racks - hardline GM DBO’s stay on the tile/gondolas.
There was a book - about a year ago - that spelled it all out. Our SD still refers to it when there are any disagreements about who should do what.
GM has the hours to do anything on a gondola - even baby bath which is all clothes/towels.