You can buy Demiverse, which is a 5e setting, from DriveThruRPG. The Demiverse can also be played with Those Who Wander rules.
Exclusive Preview: Demiverse is a fractured reality of a 5e/Those Who Wander setting
Gnome Made Games’ Demiverse funded on Kickstarter in less than two days. It’s a campaign setting of up to 50 different but loosely connected planes or demiplanes.
Routinely Itemised: RPGs #119
Games company expelled from Origins, another up for sale at an eyewatering price, and so many tempting new games. A busy week of RPG news!
Those Who Wander: Adam Hancock’s fantasy adventure born from versatile parentages Kickstarts
Those Who Wander, a name born from Tolkien’s “Not all those who wander are lost,” starts with a character creation of two based on parentages.
Worth your money: An Elf and an Orc Had a Little Baby: Parentage and Upbringing in D&D
A DMs Guild Dungeons & Dragons supplement that lets you design characters of mixed race and different upbringings.