- In ARK: Survival Ascended, open Join ARK.
- Set the session filter to UNOFFICIAL — not Official, not Favorites.
- Search for the server name in the name box.
- Right-click it and Add to Favorites so it's one click next time.
The in-game list is provided by Epic Online Services, so the server is found
by name — the address above is only needed for direct connect.
If you're on the same home network as the server, the public address may not
work unless the router supports NAT hairpinning; use the local address instead.