  In this paper, we have explored the observed matter-antimatter asymmetry in
the Universe to constrain the model parameters in extended symmetric
teleparallel gravity (STG) or $f(Q,T)$ gravity, where $Q$ be the nonmetricity
and $T$ be the trace of energy momentum tensor. We have considered two
functional forms of $f(Q,T)$ to find the baryon asymmetry to entropy ratio
calculated at a decoupling temperature. Two different data sets namely Hubble
data set and the Hubble+BAO+Pantheon data sets are used to constrain the scale
factor and the constrained model is used to obtain the baryon asymmetry to
entropy ratio. It is observed that, model constrained from the Hubble data set
favour a narrow range of the $f(Q,T)$ gravity parameters to reproduce the
observed baryon asymmetry.
