Hey @everydaywiners,
We have made changes in the recent version of the plugin to make the user experience better and give more flexibility in customizing the maintenance page, as you can now use Gutenberg editor or a page builder to easily customize the page and select a pre-created design or create your new custom one.
Do you see the migrate button on the settings page of WP maintenance mode? if you will use the migrate button(don’t worry you can roll back too) then you can migrate to the new changes and can use any of the starter templates (or create one). In your case, you can use the coming soon template that we have in the design library and also you can edit the content of this template by going to pages.
One quick thing, the form on the template requires an SMTP server which you can set up by following this documentation.
Thank you