That appears to be the case in Australia’s NEM grid, where utility scale batteries are able to meet synthetic inertia needs [1] (as well as preliminary trials of grid forming inverters in Chile, which NREL took part in [2] [3]).

[1] https://www.energy-storage.news/news/australian-transmission... (Australian transmission operator’s commercial arm to tender for 300MW unsubsidised battery project)

[2] https://www.nrel.gov/news/features/2020/renewables-rescue-st... (Renewables Rescue Stability as the Grid Loses Spin)

[3] https://www.nrel.gov/docs/fy19osti/73207.pdf (NREL: Highly Accurate Method for Real-Time Active Power Reserve Estimation for Utility-Scale Photovoltaic Power Plants)