I would too. It's interesting that I don't see much advertising done by Bisq. I guess since it's not really a "business" in the traditional sense of the word, the expectation is that it'll grow organically by word-of-mouth advertising. I've been doing my part, lol.
It's similar situation with Bitcoin, it mostly has mouth to mouth advertisement, and they are working behind the scenes on updates and improvements.
You can't really advertise Bisq a lot in current state until they make some major changes that are coming in Bisq 2.0 Misq next-generation trading protocol.
If you check Bisq official githgub Roadmap you will see thewir next goals is to improve Liquidity, Security, Reliability, Onboarding and Management.
https://github.com/orgs/bisq-network/projects/3I played around with Bisq some years ago, but never really used the service in earnest until around 8 or 9 months ago. Since then it's been my favorite ('hehem, to borrow n0nce's term) on/off-ramp. But it's also my favorite way to exchange BTC/XMR.
Atomic swaps would be best for this purpose, but I don't know what happened with project that offered easy BTC/XMR atomic swaps.
I'm in front of a PC most of the day, so I likely wouldn't get much use out of a mobile app, but I agree that would help draw more users.
Same as me, but you should consider that majority of people worldwide and mostly using their smartphones for everything, especially younger generation.
I am not expecting average grandpa will jump on using Bisq on smartphone for sure, but you never know

I don't know how it would be supposed to work with Bisq's current architecture, though. It requires at least the trade offer 'maker' to be online at all times, which is going to be hard on a mobile phone.
They would have to change a lot of things for sure, but some lightweight version could be created, at least for atomic swaps.
Misq is Bisq next-generation trading protocol, so I am expecting some nice surprises with new release.
There is one video about that release on their youtube channel with more information:
https://www.youtube.com/watch?v=UOarJpbg4EY