Backup and Restore Certificates

Is this still the case? I’ll have to replace a problematic router with a new one. It will be the same model. I noticed that “/export” doesn’t export certificates… Which is a shame, but fine. Will certificates be backed up and restored by “/system backup”? Is “/system backup” even usable if I try to restore it to a different router (but the same model!)?

Is there a recommended way to backup and restore config including certs & keys?