Thanks for your help!
I found the solution to my issue and it was pretty simple and almost a stupid solution but i think it’s because sometimes Kyocera is a little picky.
The solution:
Delete device on LibreNMS > Restart network interfaces on the printer side > Add device again > Solved it
The only change i made in the printer was on the DNS server, i change it for google dns, but i’m pretty sure this is not related with the final solution.
Also the firmware upgrade was not needed on my case.
If this does not work for you maybe you can try to change snmp v2 to v1.
GL guys and thanks again!