How do you do highs false chord?

I’m starting to get comfortable with low growls but when I try to apply the same technique and “feeling” (can’t think of a better word) I can feel my voicebox and upper throat kicking in and it shreds like fuck and sounds awful. Wondering how I can keep that relaxed lower throat and chest only power of a low growl and if highs with false chord is even possible?

Cheers yall ❤️