Help with nested loops

[zoopli]

I am struggling getting nested loops to work for me.
My goal is for me to create dns record manifests per server and subdomain. But I just could not to get nested loops to work for me.
Here's what I'm trying to do: Playground

schema Server:
    desc?: str
    ipv4: str
    ipv6: str
    domains: [str]

_servers: {str:Server} = {}

_servers.proxmox = Server {
    desc = "baremetal hetzner server"
    ipv4 = "99.99.0.2"
    ipv6 = "9999:9999:3080:2696:0000:0000:0000:0001"
    domains = [
        "*.server1"
        "server1"
    ]
}

_servers.c2 = Server {
    ipv4 = "88.88.0.1"
    ipv6 = "8888:8888:0003:09B2:0000:0000:0000:000A"
    domains = [
        "server2"
        "*.server2"
    ]
}

# I want to get 4 results one for each domain per server
# https://www.kcl-lang.io/docs/reference/lang/spec/expressions#comprehensions
serverrecordlist = [{
    spec = {
        a = {
            name = server.domains[0]
            target = server.ipv4
            ttl = 60
        }
    }
} for _, server  in _servers]

[zoopli]

an random in a chatroom was able to resolve my question:

serverrecordlist = [{
    spec = {
        a = {
            name = domain
            target = server.ipv4
            ttl = 60
        }
    }
} for _, server in _servers for domain in server.domains]

[Peefy]

https://play.kcl-lang.io/?s=JYWwDg9gTgLgBCAhgO2AMwKYGcZYFB5YDGAFhknAMoZQBuNAXHnC3ACbZED8DcOUzVsDC0ALL36CWw2gDYJMAa3YQkwZFl4BtfgF0CAfSw16UTXADe-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

I've tried like this code

import manifests

schema Server:
    desc?: str
    ipv4: str
    ipv6: str
    domains: [str]

_servers: {str:Server} = {}

_servers.proxmox = Server {
    desc = "baremetal hetzner server"
    ipv4 = "99.99.0.2"
    ipv6 = "9999:9999:3080:2696:0000:0000:0000:0001"
    domains = [
        "*.server1"
        "server1"
    ]
}

_servers.c2 = Server {
    ipv4 = "88.88.0.1"
    ipv6 = "8888:8888:0003:09B2:0000:0000:0000:000A"
    domains = [
        "server2"
        "*.server2"
    ]
}

serverrecordlist = [{
    spec = {
        "${domain}" = {
            name = server.domains[0]
            target = server.ipv4
            ttl = 60
        }
    }
} for _, server  in _servers for domain in server.domains]

[zoopli]

yes, that was it thank you - it was not clear to me that the "outer loop" comes first as I am not used to pythonic languages