I would do: Deliveroo/Uber Eats for the voucher as long as she's in a city that offers it!
For the stocking: nicer toiletries from the ones she'd buy herself, hot chocolate powder, noodles in interesting flavours, mascara, those gel hand warmers you snap, flavoured coffee sachets, silk scrunchies if long hair, coin pouch with £1 coins (always handy!), socks - either everyday or cashmere, bath bombs...
Tradespeople I'd do a nice box of chocolates - not your usual Heroes/Celebrations etc.
Cleaners I'd be inclined to do a small gift (nice hand cream gift set?) and the rest in cash.
Online tutor I'd be tempted to do a generic one that covers a load of stores so they can pick.