Has there been any signs of Quarians so far?

Ahhh, so there is hope of "Jiggly bum bum" after all?.......

For the purposes of andromeda, the quarians are extinct. Fans complaining about the ME3 ending accomplished that. It ensured that we could no longer have games in the milky way. 
So thats your answer.

Comments such as this for example killed off the quarian species and ensured their extinction in ME franchise. You can't have your cake and eat it too.

extrapolate what?

Oh you meant elaborate, not extrapolate. 

We have four races going to andromeda and despite the game bring 3 weeks away, there is no hint of any quarians in the game. 
It is possible but not very likely. 
In a story, its not realistic to expect quarians to go to andromeda since everything they did was for the quarian fleet and reobtaining their homeworld. Some random quarian might choose to abandon the fleet and go to andromeda but s/he would be the only one. If there is one quarian, s/he is likely to be the 'varied staff' on the nexus. But the quarian species as a whole is gone.
The quarian also won't be anyone too important to the story.

Sorry, you can't use the word 'extrapolate' on its own. Thats like you saying 'to infer' on its own. It doesn't make sense. 

It is because we can longer see the quarian people in ME because they were specific to the milky way. Its very simple. How then, are the quarian people gonig to be in andromeda? Each ark holds 20,000 people and the quarians don't get an ark. They are not important enough. The arks will be used for colonisation.     Like I said, there might be one or two on the nexus or something but they won't be important to the storyline. So for the purposes of the ME franchise, they are old news.

The argument that quarians have place only in Milky Way context is weak since its easy to imagine a part of the fleet seeking habitable world in another galaxy as a contingency plan. Besides even when they were a big part of the story their actual on screen presence was relatively small.

Well I'ma Quarian, I'm right here, & who so said I won't be in Andromeda? Someone's gotta keep the Andromeda Toasters at bay.

Your english grammer is not my problem.
The quarians in the game are not extinct but the fact that the fans will never see the quarian people again means, they might as well be. So its possible you might see a couple but the whole quarian culture did not come to andromeda. They do not have an ark and therefore they do not have a means to colonise a planet. So I ask you, whats the point in bringing large amounts of quarians to andromeda if they cannot create a colony there?