North America

Available now in the USA and Canada.
Ask your local brick and mortar game store to order a copy in.
I am aware that Noble Knight in Fitchburg, Wisconsin is stocking it. They do online sales.

Australia
GamesWorldSA -online and in store in Adelaide Arcade, Marion, TTP, and West Lakes, SA

New Zealand Game cafes and lounges
come and try Kiitos in these fine game cafes (retail copies may be available)
Cakes and Ladders in Auckland

Dice Goblin in Royal Oak, Auckland

Counter Culture in Wellington

New Zealand Brick and mortar stores roughly north to south (that may have online shops too):
(This list is a little out of date)
Whitcoulls, at select stores, nationwide

Marston Moor, Kaitaia

Paihia Bookshop, Paihia

Retrospace Takapuna, North Shore Auckland
Dorothy Butler Children’s Bookshop in Ponsonby, Auckland
King of Cards Auckland CBD
Pop Stop Sylvia Park in Auckland (near JB Hi-Fi)
Toyco St Lukes in Auckland (near the Warehouse)

Beach Habitat Haiei, in Hahei

Gateway Games in Tauranga

Escapist in Hamilton (which is also an Escape Room)
Game Centre in Hamilton

Atlantis Books in Rotorua and Tokoroa

Toyworld New Plymouth

Valkyrie Games, Palmerston North
Bruce McKenzie Booksellers Palmerston North

Calico Keep in Paraparaumu

Cerberus Games Wellington
Caffeinated Dragon Games, Wellington

Crackerjack Toys, Nelson

Piccadilly Books, Avonhead, Christchurch
Pop Stop in Papanui and Riccarton Mall , both in Christchurch
Scorpio Books, Christchurch CBD

NZ Online Only
SchilMil Games is another New Zealand based board game publisher. They have an online shop.
Seriously Board and Game Kings are New Zealand based online gaming shops.