Raw overexposure cannot be fully recovered. The highlight recovery module can help with that, but it’s all ‘guesswork’.
The non-blown parts are another matter, tone equalizer (which is actually a cleverly masked exposure correction tool) can help with those. Masking always entails a risk of halos, so be careful.
Can you share a raw? Maybe in the PlayRaw category, with a suitable licence? Instructions are in this post: About the Play Raw category.