Functions as both verb ('to give change') and noun ('the change').
找 here is the older sense 'to give back / make up,' not 'to look for' — same usage as in
找钱 (zhǎoqián, 'give change'). With mobile payment dominance in China, you'll hear this less often than 'add me on WeChat Pay,' but it's still standard at markets, taxis, and overseas.
