The Genshin Impact Fandom Wiki has tables on extrapolated values based off of the current running theory on poise. Actual gameplay may differ from the values there, as the theory is still evolving.
Finding:
The velocity from fall dmg can be influenced by interrupt resist or poise, and can increase fall dmg to 160%.
Evidence:
Original clip is from xf3, then made to edit to make it side by side. In the video below it shows an abyss mage with 0 poise (stunned/staggered) vs an abyss mage with 2.25 poise. mage at 0 poise was launched at higher velocity than the mage who is dancing. This is easily reproducible.
Video
Significance:
Before launching an opponent with Jean E, reduce its poise to 0 and stagger them first, then watch your fall dmg hit higher numbers.
Finding:
Different sources of interrupt resistance can stack.
Evidence:Youtube
No interrupt resistance: Staggered on hit 1
Guide to Afterlife: Staggered on hit 3
Raincutter: Staggered on hit 4
Guide to Afterlife + Raincutter: Staggered on hit 8
Significance:
Stacking interrupt resistance allows characters to further avoid being staggered.