The 20-year-old had injury issues last term and got the chance to go to the Swans in January.
He got an extension when the COVID-19 pandemic shut down the leagues for several months.
And Klopp hopes to have a talk with the Englishman, who has scored seven goals since January in the Championship.
He told reporters: "The plan with Rhian we will talk to Rhian and not here. But it (the loan) was unbelievably important and I'm really happy we had the opportunity to do so.
"In his first proper senior year he had an awful injury. He needed a long time and that's why we said immediately when he came back it made no sense to be here as third striker. It was a lot different to other situations.
"He was really happy that he could go to his former coach who knew him from the youth national team.
"They really wanted him and it's really important for a young striker, because they cannot score every week but they still should stay on the pitch.
"He played a good season and Rhian showed his talent.
"For the moment it's nearly perfect but how it will be next year we will talk with him and his representatives."