I am aware of support for Intel Compiler in Dymola 2021 but I don't know if Intel MKL variants are used for the linear algebra libraries (BLAS, LAPACK etc.) in the solver. I was wondering if there is some setting to switch the solvers to use the MKL variants.
I tried using the -Qmkl compiler flag but I am unsure if that makes any difference
Update: Looks like Dymola isn't making use of MKL libraries even if you select the intel compiler. MKL_VERBOSE seems to have confirmed it.