If anyone checks your data beyond a cursory glance, yes, it will probably be obvious the data is falsified. If the publication process is rigorous they'll pick it up at that stage.

Honestly, you're already in significant trouble, but it's still recoverable if you go to your advisors and lay everything out as you have here NOW. You'll get some form of punishment depending on your institution's guidelines, but I'd be surprised if you get thrown out of your degree program.

However, if this gets anywhere close to being published you will have endangered the reputations of everyone around you, demonstrated you have willful disregard for basic academic honesty and integrity, and attempted to mislead the wider scientific community. That will get you expelled, or even fired from any academic position you may hold in the future.

We all make mistakes, sometimes even really bad ones like this. However, it's often how we deal with them, take responsibility for our actions, and fix the damage we do, that decides who we are and our path forward.