The cers expire after a year. They are automatically renewed if they are within 90 days of expiring but for that to work you have to actually be patching the server and restarting the service periodically.

Thanks for your response. I did some mantainance job but not a good one, current version is

v1.23.1+k3s1

, will try to update it. I was doing periodical restarts and OS mantainance

just restarting should do it, as long as you restart within 90 days of the certs expriting