After consulting with an unnamed "someone with legal experience" (Sharpie would only say "they claimed three years of law school"), the Suyu development team has decided to avoid "any monetization," Sharpie said. The project's GitLab page clearly states that "we do not intend to make money or profit from this project," an important declaration after Nintendo cited Yuzu's profitability a few times in its recent lawsuit.
From the article, they explicitly state they're not trying to profit.
You can get clips that you can attach the phone and the controller together. There are also mobile specific controllers if that's more your flavor. Mobile was surprisingly decent to my standards for a period of time where I had no other platform, especially with emulators.