How to send a detail from previous screen to next screen using CloudDB? I only found for TinyDB 
There is no need to shout (use CAPITALS)
You can fetch the data from cloudDB on one screen, store it to tinydb, then retrieve it from tinydb on the second screen, or set it as a startValue and retrieve that on the second screen, or add an instance of cloudDB to you second screen and fetch the data you need from cloudDB once on the second screen.
It is important to note that CloudDB requires internet access and, unless you are keying off of some user-specific value (or you are the only person using the app), this data may be accessible by other users. TinyDB is the preferred option for passing data between screens since it is local to the phone.