I've a CC subscription but whenever I try to purchase Adobe Stock, it keeps saying Adobe Stock is not available in my region.
What should I do now?
I'm sorry that Stock for individuals is not available in Singapore.
From the FAQ: https://helpx.adobe.com/stock/help/plans.html
Adobe Stock subscriptions for Creative Cloud teams may be purchased at any Adobe reseller. Adobe Stock subscriptions and licenses for individuals may be purchased online in the US, Canada, Mexico, the UK, Ireland, South Africa, New Zealand, Australia, Japan, Netherlands, Norway, Sweden, Denmark, Belgium, Switzerland, Finland, Luxembourg, Germany, France, Italy, Austria, Spain, Portugal, Greece, Poland, Czech Republic, Bulgaria, Estonia, Latvia, Lithuania, Hungary, Malta, Romania, Slovenia, Slovakia, and Cyprus.