I don’t think there will ever be a restored Pokemon card market in our lifetime at least. I would rather own an un-restored PSA 5 trophy card over a PSA 10 restored card.
The market for Pokemon cards is too hyper mint focused, where sometimes PSA 8 and even 9 is seen as a disappointment let alone restored cards. I can’t speak for other card collectibles but a restored comic will frequently get around 20-50% off un-restored prices and these things are 50-70+ years old some with only a handful of issues existing