For sure! Although haveno will be amazing for cash trades but a way worse user experience than serai when it comes to instant crypto swaps like how they are implemented in monerujo.
It would be cool to add an onion-supported service like xchange.me.
I think adding a couple of those from kycnot.me would be great. I mean the user should be responsible for themselves and monerujo shouldn't be the one choose which is to be called safe enough to use.