The iphone uses a lightning cable and the macbook pro uses usb c.
Been using this for 3+ years for stuff that haven't gone usb-c yet: https://www.apple.com/shop/product/MJ1M2AM/A/usb-c-to-usb-adapter
I cloud is convenient but they don't give enough storage to expect people to go all cloud.
$9.99 a month for 2TB of storage, well worth it for the convenience factor: https://support.apple.com/en-us/HT201238, only $2.99 for 200GB if you don't need that much storage space.
She likes to plug her phone into her laptop to charge it while she is working, so I had to find some lightning to USB C cables.
I find it's easier to just drop it on a wireless charger if it needs charged, but yeah if she's going to be connecting it to her MBP on a daily basis, it's easier to just get a cable for it.