There’s plenty of different brands that aren’t just from boots and can be found in other shops. You can probably find something you need, the gift card lasts a year so use as backup for maybe future nappies/ baby food.
I’ve previously seen people sell gift cards on marketplace & eBay. But not sure how that all goes (I’d say marketplace is probably best and they’re usually solder cheaper than the value so that you’re atleast getting cash and the buyer is getting a good deal the few I’ve seen have been like £5/£10 cheaper than the value on the card.) However I’d say using it would be the best option. I know you said you don’t shop there but maybe perfume for someone’s birthday? Makeup? Toiletries? They do lots of baby bits including branded toys and clothing etc X
No.!