Take a look at these examples: ITensorMPS.jl/examples at main · ITensor/ITensorMPS.jl · GitHub
The ITensorMPS.jl package is under-documented right now since we are planning on reorganizing the MPS and MPO code that is currently distributed across ITensors.jl and ITensorTDVP.jl into ITensorMPS.jl ([ANN] ITensorMPS.jl initial release) but once we move all of the MPS and MPO code to ITensorMPS.jl we will do a better job of documenting the solvers that are currently in ITensorTDVP.jl.