There were issues long time ago after Grin getting listed/supported on Bisq in 2019. They solved those and relisted Grin in 2021[Link to forum and DAO vote]. It was quite big news then!
The problem has since been that there is low liquidity. Someone could play the role of a market maker there, unfortunately no one stepped up to take o this task.
Bisq 2 does include everything from Bisq 1. That does not mean that Grin will get an upgrade to Bisq 2’s newer easier trading methods. These new Bisq 2 methods are less private more easy and mostly likely not well suited for supporting interactive crypto like Grin.
This probably means that trading o Bisq will stay the way it has been since 2021 where you have to lock an equivalent amount of BTC as collateral when selling Grin. So yes we have DEX, and no we do not have many users or market makers using it. Therefore I am always a bit skeptical about the potential of new DEX’s supporting grin since unless they find a way to make it more user friendly than with Bisq, it is nothing new in town. Let’s start by supporting and using the DEX that already supports Grin.
Also it is good to realize that only a very small percentage of users and trades are happening on DEX’s. So for attracting new Grin users, centralized exchanges have a much bigger impact.