The mouse is not Kodi's primary source of input, a keyboard is usually much better and faster for browsing and activating Kodi's GUI.
You can also activate Kodi's debuglog by placing the loglevel tag in the advancedsettings.xml file. See the Kodi wiki for details. Restart LibreELEC after that.
All hardware should pop up in a dmesg listing, which you can get in your SSH session.
Please provide a full debug log.How to post a log
(wiki)1. Enable debugging in Settings>System Settings>Logging2. Restart Kodi3. Replicate the problem4. Generate a log URL
(do not post/upload logs to the forum)use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link