I've got magnetic holders for most knives - I don't like them for cleavers because there is so much ferrous metal in contact with the magstrip that it's difficult to remove, and the wall mounts for the magstrip may or may not be up for the task. I eventually cobbed together some 1" furring strips to have one strip along the wall, 1x1" strips to provide appropriately space gaps and another strip on the outside. The knives dropped into the gaps and all was good. It was a cheap prototype that I intended to be used ot make a good one once any issues were identified.
But I'm not a "cleaver guy" and I got rid of all but one - which now lives in a drawer with a blade guard on it - largely unused.