Hey Beth,
We don’t support customizations here, but I’m curious – can you clarify exactly what you mean here:
I am trying to add same additional fields under the Event Organizer details (community addon) but they are not updating in the database.
Where are these fields added, specifically? And how did you add them there?
If you’re adding custom fields, then they should be saved as Post Meta on the post and you can retrieve that data with WordPress’ get_post_meta() function, which you can read about there → https://developer.wordpress.org/reference/functions/get_post_meta/
Thanks,
George