Does human life have a deeper meaning beyond what we know? That is something that is difficult or impossible to understand or explain. It is a mystery.
This is not to say we cannot define our own purpose and from that create individual and even group meaning. Following a path, we define for ourselves at an earlier age can become our answer to the question, why am I here?
Living is the Answer
Of course, the mystery begins with the background. Did the universe come into being by an accident? Is that even possible? Can something occur without purpose or motivation?
Perhaps it just is. The human race evolved over many years and continues to do so. The outcomes created by humans taken as a whole are both numerous and impactful. Even astounding at times.
Human creations span a wide multitude of achievements, some could be considered good, while others bad and some just mediocre. the hallmark of all these things is they are derived through the act of living.
Life is meaning in and of itself
Everything we do, from birth, encapsulates our lives. Without a specific measure governing whether your life has achieved the purpose for which it was intended, that being a mystery, the answer lies within your own definition.
Each of us must define our own journey and self determine the value of that trip. Do the opinions of others matter? Only to the extent they influence your own assessment of success. The meaning of your life is yours to determine, execute, and assess.