However, lucky for you, the developers regularly provide players with gift codes that can be used in ... Splash Jellie outfit when you redeem a V-Bucks card between January 13 and February 16 ...

If you want to "give V-bucks", you have to give a gift card for the platform that your giftee is playing on. So if they play on Xbox One, give them a gift card for Xbox One. If they play on Switch ...