When Tahani goes to the Tibetan monastery she is wearing the cargo pants and Crocs that Michael forced her to wear in one of the reboots in season 2.
Continuing the show's love of fun eatery names, the muffin cart is called "We Crumb From A Land Down Under'.
Some of the contacts listed in Tahani's phone are: Taika Waititi, Taylor Swift, The Edge, The Queen, The Rock, Thom Yorke, Tilda Swinton, Tiger Woods, Tim Cook, Tim Gunn, and Tom Brady.
The title "Everything is bonzer!" presumably is a reference to the Australian-ism used as an exclamation of approval; a reference to the usual Good Place greeting of "Everything is fine". However, any Australian can confirm that the word is spelled (and pronounced) "bonza".
In the library scene between Chidi and Michael, Chidi briefly holds up an autobiographical book written by Tay Zonday titled "Chocolate Book." This is a fake book that is an amusing reference to the viral Youtube video put out by the "book's" author, Tay Zonday, wherein he sang a song titled "Chocolate Rain" and achieved a massive number of views that propelled him into his 15 minutes of fame, allowing him to appear on numerous talk shows and have multiple voice-acting roles.