Grid-forming converters (GFMCs) receive increasing adoption in modern power systems due to their salient advantages, such as grid formulation and improved stability in weak grids. In GFMCs, inertia and damping play an essential role on the frequency regulation of modern grids. As such, the accurate estimation of these parameters is of great value for ensuring system stability, advancing ancillary service markets, and supporting grid-forming standardization. However, existing estimation methods r