Hey there!
Could you clarify a bit more, what exactly is not working? Do you get 404/page not found errors when accessing links in your menu?
If so, that means, that while migrating your website to different domain, you missed a file called .htaccess, which has your permalink structure configured in, and missing this, will cause pages not to load, or erros “404”.
There is an easy fix for that, simply god to Settings -> Permalinks, and re-save it, that will automatically update these rules, and pages should work just fine.
If there are some images not showing up, you might need to update your website URL. What that means, depending on the way you used to migrate your website, most of the files might have old links (old domain name) as a URL, and that is why it might not show up, since URL of the images does not match the URL of your website. In order to solve this, you can use the plugin: https://www.ads-software.com/plugins/better-search-replace/
You just add your old domain name in the “Search for” field and add the new one in the “Replace with” field. Select all the tables and proceed. It will show you how many links got replaced. This should solve the issue.
P.S Always make sure to have a backup of your website before performing such actions.
