Erik Kostson
Ansys Employee

We need to have at least some form of nonlinearity, so large deflections, nonlinear contacts, or material nonlinearities - otherwise the solution is linear and we do not need any nonlinear NR iterations and thus any convergence for that (so for linear analysis we do not show any convergence graph since there is nothing to show - it does not exist)
Turn on large deflections in analysis settings and it should then appear.

All the best