Found the Giant Black Stallion (a.k.a Ganon's Horse) location in TOTK (no BOTW transfer) : r/tearsofthekingdom

Zelda: Tears Of The Kingdom: How To Get Ganon's Horse

BOTW Horse locations in TOTK : r/tearsofthekingdom

Ishokin Shrine - Ride the Giant Horse - The Legend of Zelda: Tears of the Kingdom Guide - IGN

The Legend Of Zelda: Tears Of The Kingdom: How To Find Ganon's Horse

So if anyone didn't get Ganon's horse in BotW, you can still find him in TotK. : r/TOTK

What transfers from Breath of the Wild to Zelda: Tears of the Kingdom? - Polygon

The Legend Of Zelda: Tears Of The Kingdom: How To Find Ganon's Horse

Zelda: Tears Of The Kingdom: How To Get Ganon's Horse

Zelda: Tears Of The Kingdom: Walkthrough - Collectibles, Tips, And Tricks

Zelda: Tears Of The Kingdom: Ride The Giant Horse Shrine Quest Solution - How To Get The White Stallion

How to Get GANON'S Horse - ZELDA: Tears of the Kingdom LOZ TOTK [Rare Horse]

Where to Find Ganon's Giant Horse - The Legend of Zelda: Tears of the Kingdom Guide - IGN

Zelda: ToTK - How to Get Star Fragments and What to Do With Them