I never like to contradict management, but I've been able to view the logs on a node by ssh'ing to the node (using the node IP address) and issuing a cat /tmp/syslog.log to view the node log. To watch it real-time, I've used the command tail -f /tmp/syslog.log.
(I have to confess that I've also done a number of other unsupported things on my mesh node, which is running straight Asus, such as installing Entware and scribe (to filter log entries) and vnStat-on-Merlin (so I can see how much data is being used by devices on the node). I don't recommend it, but it can be done.)
(I suppose with all of my messing with the node that the correct path for the log file on the node may be different if you're running it as a vanilla node setup.)