Example with timeQuality field:
$ echo "Yo!" | logger --rfc5424 -s -t test <13>1 2024-02-13T11:10:40.809422+02:00 oneplus-enchilada test - - [timeQuality tzKnown="1" isSynced="0"] Yo!
logread output: [Feb 13 11:10:40] user test: Yo!
Example without timeQuality:
$ echo "Yo!" | logger --rfc5424=notq -s -t test <13>1 2024-02-13T11:12:02.028241+02:00 oneplus-enchilada test - - - Yo!
logread output: [Feb 13 11:12:02] user test: - Yo!
Note the extra dash.
I've added a testcase for this now and the fix will be in the next release