Levels in any learning system tend not to be representative of real world skill. You can be advanced in a number of apps, courses and programs, but still be incapable of speaking with any level of fluency.
And even the word “fluency” is notoriously unspecific. Are we fluent when we can understand everything we read or hear, or does it only pertain to spoken language? If the latter, then are we fluent when we can get through everyday tasks easily, or does it require that we can easily hold a conversation on general subjects, or does it require more specialized abilities?
Everyone’s answers to the above questions will be different, so I fear there is no solid answer to your questions.
For me, fluency requires only the ability to speak naturally in one’s second languages on everyday subjects. I suspect that’s a very liberal definition, and probably doesn’t match what most people think of as fluency.