Im learning this cover https://youtube.com/clip/UgkxjvYJf7zvK9LQeudww6OKgoVWk2gEsFJf?si=8sqKIPJagxcVbqG0, and he does some technique here, i cant tell if he's just pressing the string past the 20th fret, if these are harmonics, or basically how its supposed to be played correctly
YouTube
5 seconds · Clipped by Cattoh · Original video "Howl's Moving Castle OST - Merry-Go-Round of Life - Joe Hisaishi - Guitar Cover" by Andrew Foy 앤디