If your earned WRX (through signup or referral bonus) is credited to your account, you will be able to see your WRX balance in the funds section. For your earned WRX to be credited to your account, you must complete at least 1 trade on your WazirX account. For referral bonus, your friend too must complete at least 1 trade on their WazirX account.
Please read through the following two articles to know how many WRX you can earn and how they are earned and credited to your account -
How can I earn more WRX coins?
Currently, you can earn more WRX coins by sharing your referral link with your friends. More details here - WazirX Referral Program - Participation, Tracking & Rules
You can also earn more WRX by participating in regular contests and bounties. Do follow us on Twitter (https://twitter.com/wazirxindia) and join our telegram announcement channel (https://t.me/wazirx). That's where we make the latest announcements about ways to earn more WRX.