There was a brief talk at IntSaab2023 at the British Motor Museum last weekend by Peter Backstrom, the head of the Saab Car Museum.
He said that the plant is currently split into three areas. The old manufacturing area, which is empty. The Research and Development buildings, which are still in use. It is where the EmilyGT was developed and built. It is currently being used by Polestar for development work, mostly by former Saab employees. The third and smallest part, the old office block, is still being used by NEVS, where they are dealing with the company liquidation matters.
Some of the plant has been bought by the Trollhättan municipality and other bits by the company run by the Swedish millionaire industrialist whose name I forget.