I struggle to see how Joelinton was any good on the wing for Hoffenheim as none of his attributes look suited to playing out wide. He isn't suited to this system either up front or out wide as he's not fast enough for the latter, and not good enough at winning the 40-60 balls for the former.
All that said, even in a system perfectly suited to him I'm still not sure he'd ever get you 10 goals a season. So you're going to need consistent goal scoring wide players or to give him a strike partner. The more time goes on it just looks a worse and worse piece of transfer business, as highlighted by Rafa 12 months ago.