help what’s wrong with my hydrangeas?

So I bought these macrophylla hydrangeas from hello hello plants and they were left in there pots that I bought them for 2-3 weeks so that they could adjust to outdoor temperatures. I noticed that they were too big for their pots so i decided to plant them outdoors. I was told to plant them in autumn so that by spring their roots can establish and can provide more bloods. I’m aware I live in an area with clay soil so I dug quite a big hole, put gypsum salt and then put a well draining soil to help the hydrangeas. Unfortunately I feel like I’ve missed something because they were doing so well before I planted them. My neighbours then had their driveway put in so there was a lot of soil thrown around as well as aggregate being washed away that flew into my plants. I’m really upset and I’m wondering whether there’s any way to save them. Would I be able to propagate them? Will they ever come back?

Someone pls help!!!

I’ve attached photos too for reference