Realm Event Countdown (Which realm is closest to close)

is there any way to find out if a realm is close to closeing either before or after u enter the realm? like a number that states how many mandatory quests are left?? would be really helpful for when i wanna farm and i end up at oryxx or vice versa

Well first of all you need to be located inside the realm to obtain object data (UPDATE packet which contains List<ObjectStatus>)
Second, the quests are seemingly random, so there is no way of telling if for example the "Ghost king" object is the last quest.

That said, there is the option of tracking down if and when a realm has closed, and connecting directly to the closed realm IP address (difficult to make, though)

But usually - if the only quests that are left are ghost kings/ancient ents/liches then the realm will probably close soon.