The code carries a small calendar entry (an iCalendar VEVENT) with the fields you enter. iPhones open it in Calendar; on Android the behaviour depends on the camera app, with Google Lens and most Samsung phones offering to add it.
Times are stored in UTC and shown in the scanner’s local time zone, so a 7 pm start in Dublin is still 7 pm for a guest in Dublin. Add the venue in Location so it links to maps.
For an invitation card, pair the event code with a second code for the RSVP or the photo album: one code should do one thing.
Questions
Does an event QR code work on Android?
On most phones yes, through Google Lens or the Samsung camera. A few camera apps show the raw text instead. If your guests are mostly on Android, consider linking to a calendar page instead.
Can I include a link in the event?
Put it in the description. Most calendar apps make it tappable.