Hello, @Kazi Sabit,
1- Don’t check the browser mobile view in customizer but please check the actual device “Mobile” you will see the result. Also, there is no such space available to adjust both buttons add to cart, and buy now.
2- You can see as well there is no such space to show it in 1 row I hope it makes sense.
Regards 8Themes Team.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.