I haven’t used them for years as I live in Ireland now, but all the prices charged by the local suppliers near me have gone up considerably since the start of the pandemic, so I don’t think they’re unusual in that respect.
Maybe work through your list against a couple of the large online suppliers like Capital and Salon Services and see if their prices are similar?
Have you increased your prices in the last two years? If not, why not? Around here all the salons have increased their prices to clients to ensure they keep their businesses viable.