Hey there @Shany_Porras1, @Shire_Talk, @Phil 
At the moment, we don’t have a workaround for this case, but we have a request for the synchronization with Google Sheets - Sync events to Google sheet.
If this feature is released, you’ll be to collect events from users using the Form Builder, pull them to Google Sheets and then connect the Event Calendar with this spreadsheet. This way, the submitted events will automatically appear in the widget.
So, feel free to upvote the idea if you’d like to see it released 