A bit of lumber and some inexpensive hardware can turn that gap into a pull-out pantry ... and below the cabinet in addition to a couple of wheels? This would help keep the pantry from scraping ...

This may be a hot take, but drawers are way better than cabinets ... These pull-out baskets are also real winners, allowing ...

One option is to update your kitchen with larger or more cabinets to accommodate the storage ... enhance functionality by ...