Figured I'd scream into the void on this thread too. The S Pen hasn't worked on any of my Samsung devices since the previous version, released a little over a week ago.
There is good news, though. A Jagex mod commented regarding this very issue on the 10th birthday thread on Reddit, stating that they are aware of the issue. A fix is planned for release with the next engine update, which should be ready in a few weeks time. No specific date was given due to the nature of engine updates.
24-Feb-2023 04:03:16