We’ve been finding exo-planets billions of light-years away and it is only now we find one around Centauri?
I think you are thinking of galaxies billions of light years away. So far the furthest exoplanet found is about 13,000 light years away. It is in our own galaxy which is about 100 to 180 thousand light years diameter so we haven’t even found a planet very far away here.
I thought that was a bit odd.