where would I be able to buy this?
In English or JP ?
If it's JP:
https://www.s-manga.net/search/search.html?seriesid=75871&order=1
You can click on each volume and if you scroll to the bottom there's links to multiple online stores that are selling it officially.
Shonen Jump also releases the chapters for free for a certain period of time. On the right hand side underneath the comic pages there's also links you can follow to purchase
https://shonenjumpplus.com/episode/13933686331775998220
If it's Eng, I don't see there being an officially licensed version yet.
THIS IS GOLD MAN, YOU DONT GET THIS KIND OF QUALITY ANYWHERE *chefs kiss*