Using Postman to create a file called test.log with raw data of {"message": "testing"} - the PUT operation completes successfully, and I can read the file back with a GET to R2.
However, looking at the dashboard the test.log file doesn’t show up. Other, larger files do show up, so I’m not sure if it’s a file size or potentially file extension issue. I haven’t done much more testing to isolate the problem further.