For those who have trouble getting the game in playstore, here's how i did it:
#1 Make new gmail account
#2 Download VPN unlimited
#3 Clear playstore cache and data
#4 Open VPN and connect to Singapore
#5 Open playstore and switch to the new gmail account
#6 Search for the game
It should work but i'm not hundred percent sure if everyone can use this method. I on the other hand, complaining about my phone (Mi max 3) not being able to use VPN is due to my email as it has been used to make online payment, in other words, this email is tied to my country. That's the reason why i cannot change the country to singapore on playstore, not unless if i use a new fresh email where i have not use for online payment yet.
Feel free to ask any question, just so you know, i might not be able to answer 80% of them.
By the way, i need some friends in the game. It's kind of lonely to play alone :')
Edit: Good news guys, Sky Children has finally released globally for Android users so go pick them up now in playstore without going through the above (unless it is still not available in your country).