Hi Jan5516,
First of all, we would like to convey that we are unable to test as we don’t have the same device at our end. Please don’t mind it.
May I know you can’t edit either OneNote or Office 365 applications on S6 Lite? Based on this article, some qualifying plans and all non-qualifying plans have a screen size limit of 10.1 inches for editing in the Office mobile apps. For example, if you're using an iPad Pro with a 12.9 inch screen, you must have a qualifying Microsoft 365 plan with access to the desktop apps to edit files.
Could you please confirm whether you are having the same scenario? What is the size of your device and do you have any Office product license?? Moreover, you mentioned that you can’t edit the documents, can you provide the screenshot of the error or the user interface of Office? It will help us understand it better.
Appreciate your cooperation.
Best Regards,
Ivy