This was My Mistake:
I had a minor update in a Push Notification content part and I did not even touch my code.
But I thought I might have to re-upload it in order to reflect that change in the latest version.
And I did.
Tried to upload 3 Builds One by One.
But Not a single build has shown in the Test Flight Version.(Shocked)
Later I realized my mistake that just by updating APNS content part without even touching my code, I was trying to upload a new build and was expecting to reflect it in the Test Flight. (So stupid of me)