Yes, but this is because decentralized exchanges have small trading volumes. if there are large volumes there, it will be possible to trade more.
I also think that there are few traders on decentralized exchanges for two reasons: firstly, there is no liquidity, and secondly, they are really inconvenient.
As for liquidity ... depending on what to compare. On some centralized exchanges, the liquidity of trades is much lower than on decentralized ones. And nothing live stock exchange.