Thank you for the validation screenshot.
Hm… 
everything seems to work fine from the validation
Which version are you using, and are you updating to latest libre?
I’ve recently updated to 1.67 from 1.66, you should see ./lnms migrate during validation
You might need to setup a second deployment of my tutorial steps from scratch to see whether it works, as I didn’t upgrade from before the new alias/db options. I suspect there might be database mismatches that point to invalid RRD links, thus the missing graphs…
(Do note that this deletes the device RRD graphs) If you have a not-so-important device, could you try to remove that device from LibreNMS and add it back again to see whether the graphs show up?
If you wish to keep the current data, I would recommend setting up a second set of librenms/mariadb with different port. eg: 8669 , and see whether the deployment works from the beginning