Quick launch camera in S9 plus

In indian version double tap power button to launch camera is not available due to security reasons.
If you use AOD then there is option of double tap home button to quick launch camera.

No bro
there is no option to double tap power button to quick launch camera

Thanks for being with Samsung and sharing your concern. We would like to inform you that Quick Launch Camera feature is not available in Samsung device as per now. However we have noted down your valuable feedback and we will surely share this with our relevant department, any update in this regards will be conveyed to you via various means of communication. Be sure to hit ♡ when you find an answer that works for you.
For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/

use bxActions form playstore, you then remap Bixby button to launch Google assistant on single tap or camera on double tap and more.