##Bäst hittills == dåligt
KillPackets # show system ntp
config system ntp
    set ntpsync enable
end
configure , then you get
config system ntp
    set ntpsync enable
    set type custom
    config ntpserver
        edit 1
            set server "ntp.hv.se"
        next
    end
    set server-mode enable
    set interface "fortilink"
end
ntpmethod : "PUT"
url : "/api/v2/cmdb/system/ntp"
params :
datasource : 1
vdom : "root"
data :
authentication : "disable"
interface :
0 :
interface-name : "fortilink"
key : ""
key-id : 0
key-type : "MD5"
ntpserver :
0 :
authentication : "disable"
id : 1
interface : ""
interface-select-method : "auto"
key : ""
key-id : 0
ntpv3 : "disable"
server : "ntp.hv.se"
ntpsync : "enable"
server-mode : "enable"
source-ip : "0.0.0.0"
source-ip6 : "::"
syncinterval : 60
type : "custom" 
KillPackets # diagnose sys ntp statusipv4 server(ntp.hv.se) 193.10.199.83 -- reachable(0xff) S:3 T:5 selected 
        server-version=4, stratum=2
        reference time is e7179248.fbc84a4f -- UTC Thu Nov 10 15:07:52 2022
        clock offset is -0.012920 sec, root delay is 0.007278 sec
        root dispersion is 0.016693 sec, peer dispersion is 283 msec

bye