This is because of the effect of the energetic oneness that Twin Flames have due to having shared energetic vibration that originates from the source of their Soul connection.
From my experiences, I believe that the journey of being a Twin Flame is about learning to embrace the Oneness that Twin Flames share. It is a journey of realizing the power of being a Twin Flame. This is my Twin Flame Awakening Story
Once you meet your Twin Flame, you realize that your life changes forever. You start to change to become your authentic version which is you accepting that you have been a Twin Flame all along way before you found each other.
After the Soul lessons, you also understand that you met for a reason with your Twin Flame. It was not coincidental that they found each other the way you did because everything is divinely guided. You can also manage the pain of physical separation from your Twin Flame – These simple tools helped me too.
In essence, I am my Twin Flame and I feel it whether we are in the same room or physically separated.