This whole setup came out of the backing so I’d like to replace the whole thing but I don’t have pipes, the supply line is hoses so I’m not sure what kind of valve I need to look at.
So I’m a paranoid person, if they don’t already have the parts for the replacement I would question how long they would take to acquire after turning the water off…
I would worry about this too. That's why, even though I would also be too paranoid to use sharkbite fittings long-term, I would suggest having a few sharkbite end caps on hand for each size of pipe you have. That way, you can temporarily cap it off and turn the water back on if necessary.