Other gave good responses, but here are two papers which test the Marxian Labor Theory of Value with contemporary economic data if you are interested:

Zachariah, Dave. Labour Value and Equalisation of Profit Rates: A Multi-Country Study.

Tsoulfidis, Lefteris, and Dimitris Paitaridis. “Chapter 8 On the Labor Theory of Value: Statistical Artefacts or Regularities?” Research in Political Economy, edited by Paul Zarembka, vol. 25, Emerald Group Publishing Limited, 2009, pp. 209–32, https://doi.org/10.1108/S0161-7230(2009)0000025011.

The bibliography of the first paper also has a lot of related reading.