Just for the record, Coinomi is making a comeback, and according to their developers, they are coming back as open-source. I have no idea if that is true, though. But it might be worthwhile to keep an eye on it. Their multicoin wallet used to be a good mobile option in the past despite being closed source. But then everything went downhill. If they can resume where they left of and fix their problems + become open-source, they might against be a great choice for a multicoin wallet.
One of the main reasons I started using it was to convert my stablecoins into Bitcoin without having to deal with a centralized exchange. Cake Wallet seemed to fit perfectly and it's worked out great for that.
Keep in mind that you can still use centralized swap services and custodial exchanges through Cake Wallet as shown on the screenshot in one of your posts. Unless you manually pick something like THORChain. Some of those exchangers have a terrible reputation.