$\pt$-differential production cross section of $\mathrm{B^0}$ mesons measured at midrapidity ($|y|< 0.5$) in pp collisions at $\sqrt{s}=13.6$ $\mathrm{TeV}$ compared with FONLL  and NNLO+NNLL calculations (left panel) and ratios of the data to the theoretical predictions (right panel). Statistical uncertainties are depicted as vertical error bars, and systematic uncertainties as boxes. The systematic uncertainties related to normalisation are quoted separately as text.