What happen if you deactivate the “html After URL” plugin?

We recently inherited a WordPress website that uses the Elementor page builder and has the “HTML After URL” plugin installed and active. I have a few questions about this plugin and would greatly appreciate your guidance.

1. If we deactivate the “HTML After URL” plugin, what impact will it have on the website’s functionality? Will it cause any issues or break any existing features?
2. We understand that deactivating the plugin will require us to set up redirects from the .html pages to their non-.html counterparts. Is there a recommended process for implementing these redirects efficiently?
3. Before deactivating the plugin entirely, is there a way to test the impact by disabling the .html extension for a select few pages? This would allow us to assess any potential issues on a smaller scale.
4. Are there any other considerations or precautions we should keep in mind when deactivating this plugin on an Elementor-based website?

Any insights or advice you can provide would be greatly appreciated. We want to ensure a smooth transition and minimize any potential disruption to the website’s functionality.

Thank you in advance for your assistance!