My comments were more about tendencies, i.e. people want convenience; if I was a shitcoiner and I had to go to three of four different sites to trade fiat at one, XMR at another, Shithereum at a third, and Tron at a fourth just to avoid KYC or taint proclamations, I might just give up and hand over all my data to CoinBase.
You can trade all of those except Tron on Bisq already. You can add an altcoin account by following the steps here:
https://bisq.wiki/Creating_a_payment_account#Creating_an_altcoin_account. Also, I have no data to support this, but the thought occurs to me that the person who is throwing their money away on shitcoins left, right, and center, probably isn't a person who is closely guarding their privacy.
If Bisq made trading those shitcoins easier, and included "accounts" for multiple smart-chains, more people might find it more attractive.
There is simply not enough demand. Bisq used to host even more altcoins than it does, but many were removed because they had literally zero volume over a period of months. The developers have decided that in general it is not worth their time and effort to integrate a new coin if it will have zero volume, which is understandable. There was a big discussion about this here:
https://github.com/bisq-network/proposals/issues/153