Normally I like to present ways to expose LXD containers on your LAN via either bridging or macvlan. If you would rather not have a new LAN address for your LXD containers, you can just create the container and by default it will have a NAT address internal to your LXD host. In this video, I show how to expose ports from NATed containers to your LAN using proxies.
Create a simple LXD container.
lxc launch ubuntu:22.04 test1 --profile default -c boot.autostart=true
Create a proxy for port 80 which will expose that port to the LXD host address at port 8080.
lxc profile create proxy-8080 lxc profile device add proxy-8080 hostport8080 proxy connect="tcp:127.0.0.1:80" listen="tcp:0.0.0.0:8080" lxc profile show proxy-8080
Add the proxy to the container we created above:
lxc profile add test1 proxy-8080
Enter the container from your lxd host:
lxc exec test1 bash
Update the repositories and install the Apache web server as a test:
apt update apt install apache2 -y
Go to your web brower at port 8080 and you will see that apache has been proxied to that port. For example, in my case: