Resolving site domain

I have created a site from scratch in flywheel local.

I turned on Live Link and it generates the ngrok url.
I decided to change the site domain to something I could use for my testing. dev.sitename.org
I added dev.sitename.org to my DSN entries on my domain sitename.org
Usually this is what I do for MAMP. But I am unable to get to the site externally using that name.

Can you provide some guidance on this?

Thanks!