How can one define the quantum interferometric power in the case of a multiparametric system using the quantum Fisher information matrix?

Question

please, was the quantum interferometric power defined in the case of a multiparametric system? I know that in the case of a single parameter, the quantum interferometric power is defined as the minimization of the Fisher information, where the minimum is intended for all Hamiltonians with a given spectrum, with a normalization factor of 1/4 for more convenience. But in situations where more than a parameter is involved, the relevant object in the estimation problem is given by the so-called quantum Fisher information matrix. How can one define the interferometric power? Also, if we diagonalize this matrix, does this give a link at the level of quantum correlations? Thanks in advance for any help