Can a Fleet Solid Support design become a tanker or amphibious ship?

Could the Fleet Solid Support ships become tankers or amphibious auxiliaries?

They could support amphibious forces with stores, but turning the design into a tanker or amphibious vessel would require extensive redesign.

Fleet Solid Support ships are designed around large stores capacity and equipment for moving supplies quickly. Their cranes, holds and hull arrangements suit that work. Tankers or amphibious auxiliaries require different arrangements, so changing the role would mean redesigning much of the ship. The distinction is between supplying an amphibious force and providing its dedicated amphibious vessels.