I thought that it did work on the S20, that's what's being reported by some people who have the S20. You can still purchase it from the Play Store. Just wanted confirmation that the reason you have to buy it again is because it's not support? Bit strange you can buy it if it doesn't work.
Can you confirm why having purchased it on my Samsung galaxy S7+ Tablet I've got to buy it again to play it on my Samsung Galaxy S20 phone? If I buy any other android app it works on all of my devices.