Hi Trina_k
If your webinar registration and on-demand are enabled.
You can also enable the [Follow-up Email to Attendees] and [Follow-up Email to Absentees] from the Email Settings manually.
Also if you want to share the recording after the Webinar, you can only send the registration URL of this Webinar.
Then people can register and watch to the Webinar recording.
Please uncheck this option of [Close registration after event date] from the Registration Settings before the Webinar started.
If you want to deeply check the On-demand webinars, please refer to this URL.
https://support.zoom.us/hc/en-us/articles/360000489183-On-demand-webinars
Hope my answer can help.
Jing