About the only thing they can do is transfer food, mail and fuel.
You cannot reload VLS tubes on a submarine from a sub tender and you cannot reload VLS tubes from a supply ship.
The entire structure of US naval surface groups were meant to fight a two-three week intense conflict. It would take ground based assets from Saudi Arabia, Israel and at the extreme end of the likely scenarios Egypt to keep up sustained operations.
I can’t imagine Egypt is at all pleased with the evaporation of Suez traffic and would love to assist but publicly cannot or will not.
Again why do US Navy supply ships call on Indian Island munitions depot? For fun? RR&R? Too crowed at Bremerton?