Add to Calendar Button for Flow Screen/Community – Lightning Web Component [LWC]
Update: Outlook (ONLINE) URL has been updated. Thanks to @thestrategicorg for reporting the issue.
Recently, I did write an aura component which implemented ADDEVENT.COM Add to Calendar button which is PAID but here I did wrote another component (an appexchange package for you) which can be used on any Salesforce Lightning Page, Community Page or Flow Screen.
A button which initiates a Modal Box with all the available options including ics files for Apple and Outlook.
Flow Screen Options are simple enough to understand fields and their formats