Use the event's sharing option to copy its link, then send it in a message. Services such as Telegram, WhatsApp, and Discord can show an invitation preview.
What does the link show?
The invitation shows the event title, time, room, organizer, and how many people are going. Someone opening it sees the time in their own time zone.
Does a link let anyone walk into the room?
No. People joining through a share link are guests and still knock. A link is not a member invitation.
Can I stop using a link?
The organizer can turn the event's share link off or replace it. Use the event's sharing controls if you no longer want the old link to work.