DnsMasq allows me external accesses but blocks services as YR Symbol and Nest Thermostat

Hi guys I need some support on a question I am facing

I am able to reach my home assistant setup within via 192.168 ip adress

but when I try to access via external via duckdns domain I does not work

Solution I found is using DNSMASQ as my router does not support NAT loopback

But a new issue is that Nest does not allow to be configured and for example Yr symbol does not work. When I turn off MasqDNS and access my home assistant via 192.168 ip everything works back as normal again :smile:CONSFUSING