Jumping PHB p182
Your Strength determines how far you can jump.
Long Jump
When you make a long jump, you cover a number of feet up to your Strength score if you move at least 10 feet on foot immediately before the jump. When you make a standing long jump, you can leap only half that distance.
For Video Game reasons Larian seems to have dispensed with the 10 foot running requirements.
So assuming all jumps have an implied 10 foot running start:
A Character with 10 strength can jump 10 feet.
A Character with 20 strength can jump 20 feet.
A Githyanki with 20 strength and using their psionic jump ability can jump 60 feet.
A Wizard with 10 strength and using the jump spell can jump 30 feet.
Most of the jumping in the gameplay videos featured a Githyanki who has a jumping limit of 3x their strength score when using her psionic jump(54 feet for an 18 strength)
I don't recall Lae'zel jumping more than 54 feet in the gameplay videos, so her character seems to be following the rules of 5E.
