To preface this, I'm not an expert, I'm just an avid astronomer with little mathematical knowledge.
I was watching a video that was explaining the cosmic scale and how the observable universe is only a fraction of the whole since the light from objects passed the cosmic horizon haven't reached us yet and it got me thinking about how we know the universe is 13.8 billion years old.
If we found the age of the universe based on redshifts and how long it takes the light from objects at the edge of the observable universe to reach us, would the age of the universe change if we stood at the cosmic horizon and measured the light of objects further out since we'd have expanded the boundary of what we can observe?
Let me try and word it differently. If the radius of the observable universe is 46 billion light years from earth and we stood on a planet 46 billion light years away and used the Hubble telescope to see another 46 billion light years, would we have to recalculate the age of the universe since we'd be looking at objects in a radius of 92 billion light years?