This isn't a hack a student can do, but one they can request. If a student is truly stuck and the program is moving too slowly or is too difficult, the software has a placement algorithm. A student can speak to their teacher about adjusting their "starting point." Teachers have the ability to manually adjust a student's level if the data suggests the current level is not a good fit. This is the official, sanctioned way to "skip" levels.
Even if a student manages to bypass a level without the teacher noticing, they have succeeded only in skipping the material. Lexia is scaffolded; Level 10 builds directly on the skills mastered in Level 9. If a student hacks their way past a fundamental concept, they will be entirely lost when they reach the next unit, leading to inevitable failure down the line. lexia core5 hacks
You may see mentions of "auto-answer" scripts or "level skippers" on sites like GitHub or YouTube. This isn't a hack a student can do, but one they can request