Where can I find kernel logs for UmbrelOS? To troubleshoot random freezing

Support and Troubleshooting
1

I installed Umbrel OS on a laptop Dell Latitude E5450, on the external SSD.
The initial blockchain sync worked without any issues, took a few days.
But now that the node is fairly idle most of the time, it tends to stop working after a few hours. I’ll paste the log I could find below, but as you can see a lot of logging is missing. I’m looking for kernel logs but I can’t find them anywhere.
Both /var/log/dmesg and /var/log/messages don’t exist.
Where is Umbrel hiding the kernel panic logs?

Here are the logs I did find. Notice the “boot” line that occurs when the node freezes, until I reboot it. I understand that the string after boot represents the boot number as in the following command:

sudo journalctl --list-boots
IDX BOOT ID                          FIRST ENTRY                 LAST ENTRY
 -4 e2698642093a4aeba141fbd430a38d6c Wed 2024-05-29 21:15:12 UTC Fri 2024-05-31 07:30:17 UTC
 -3 8dcde92e61514ba8a2726afca6cf22fe Fri 2024-05-31 07:30:41 UTC Sun 2024-06-02 10:30:07 UTC
 -2 669a773756934f8080b5a53aeabf2b38 Sun 2024-06-02 20:31:45 UTC Sun 2024-06-02 22:35:54 UTC
 -1 f9607866cd784a29861319484d5c5a36 Sun 2024-06-02 22:36:18 UTC Mon 2024-06-03 05:12:01 UTC
  0 13a89a39a867489dbd59b2f97661691b Mon 2024-06-03 12:20:50 UTC Mon 2024-06-03 23:01:05 UTC

And the following command doesn’t give me enough context to know what caused the crash.

Command:

sudo journalctl --system --since "2024-06-02 10:26:00"

Output:

Jun 02 10:26:11 umbrel dhclient[610]: RCV: Advertise message on eno1 from fe80::b2be:76ff:fe22:39b5.
Jun 02 10:26:37 umbrel umbreld[850]: [apprepository] Checking for update for https://github.com/getumbrel/umbrel-apps.g>
Jun 02 10:26:38 umbrel umbreld[850]: [apprepository] https://github.com/getumbrel/umbrel-apps.git is already up to date
Jun 02 10:28:05 umbrel dhclient[610]: XMT: Solicit on eno1, interval 121800ms.
Jun 02 10:28:05 umbrel dhclient[610]: RCV: Advertise message on eno1 from fe80::b2be:76ff:fe22:39b5.
Jun 02 10:30:07 umbrel dhclient[610]: XMT: Solicit on eno1, interval 118670ms.
Jun 02 10:30:07 umbrel dhclient[610]: RCV: Advertise message on eno1 from fe80::b2be:76ff:fe22:39b5.
-- Boot 669a773756934f8080b5a53aeabf2b38 --
Jun 02 20:31:45 umbrel kernel: microcode: microcode updated early to revision 0x2f, date = 2019-11-12
Jun 02 20:31:45 umbrel kernel: Linux version 6.1.0-21-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14)