Either you have a configured log rotation or you redirected logs to the file (in this case you need to search in the log file instead) or you have disabled a filewalker on start.
Unlikely.
and I can confirm that on my nodes.
$ grep walk /mnt/x/storagenode2/storagenode.log | tail
2023-11-09T12:00:09Z INFO lazyfilewalker.used-space-filewalker starting subprocess {"process": "storagenode", "satelliteID": "12EayRS2V1kEsWESU9QMRseFhdxYxKicsiFmxrsLZHeLUtdps3S"}
2023-11-09T12:00:09Z INFO lazyfilewalker.used-space-filewalker subprocess started {"process": "storagenode", "satelliteID": "12EayRS2V1kEsWESU9QMRseFhdxYxKicsiFmxrsLZHeLUtdps3S"}
2023-11-09T12:00:09Z INFO lazyfilewalker.used-space-filewalker.subprocess Database started {"process": "storagenode", "satelliteID": "12EayRS2V1kEsWESU9QMRseFhdxYxKicsiFmxrsLZHeLUtdps3S", "process": "storagenode"}
2023-11-09T12:00:09Z INFO lazyfilewalker.used-space-filewalker.subprocess used-space-filewalker started {"process": "storagenode", "satelliteID": "12EayRS2V1kEsWESU9QMRseFhdxYxKicsiFmxrsLZHeLUtdps3S", "process": "storagenode"}
2023-11-09T16:33:41Z INFO lazyfilewalker.gc-filewalker starting subprocess {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE"}
2023-11-09T16:33:41Z INFO lazyfilewalker.gc-filewalker subprocess started {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE"}
2023-11-09T16:33:42Z INFO lazyfilewalker.gc-filewalker.subprocess Database started {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE", "process": "storagenode"}
2023-11-09T16:33:42Z INFO lazyfilewalker.gc-filewalker.subprocess gc-filewalker started {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE", "process": "storagenode", "createdBefore": "2023-09-19T17:00:07Z", "bloomFilterSize": 364472}
2023-11-09T16:42:38Z INFO lazyfilewalker.gc-filewalker.subprocess gc-filewalker completed {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE", "process": "storagenode", "piecesCount": 610788, "piecesSkippedCount": 0}
2023-11-09T16:42:39Z INFO lazyfilewalker.gc-filewalker subprocess finished successfully {"process": "storagenode", "satelliteID": "1wFTAgs9DP5RSnCqKV1eLf6N9wtk4EAtmN5DpSxcs8EjT69tGE"}