It's been awhile coming, but the most recent update to Rocket League added in Fan Rewards for Switch. Wondering how you go about setting this up? Follow the steps below and you'll be all set!
Step 1: On the Switch version of Rocket League, go to extras and select the “Link Nintendo Account” in the 'Extras' menu
Step 2: Authorize Rocket League to use your Nintendo Account. Follow the prompts on the website.
Step 3: Once you’ve authorized your Nintendo Switch account to use Rocket League, head over to the Fan Rewards website and login with your Twitch account.
Step 4: After you login, select the Nintendo Switch as your platform of choice then add your Switch account information to the site.
Step 5: Once completed, tune in to Rival Series and RLCS broadcasts on twitch.tv/rocketleague to start earning rewards for your Switch Rocket League account.