I received cash rebates from spending on my OCBC credit card. Does it offset the next bill like cash back or store in my card until I decide to use it? If so, where do I see the total rebates in app?

I'm unable to find the total rebates that I have accumulated for my OCBC credit card spending in the OCBC app. Anyone knows where to find them? Or does the rebates automatically offset the next credit card bill like cashback does? I'm able to see this month's rebates but unable to for the previous months or the total accumulation. Wonder how this works. Thank you!