Hello,
If it is incorrect, it means that's not the key it was looking for.
On the screen asking for bitlocker key, do you see the bitlocker key ID?
Like in this example: You want to take note of the first segment of the ID.
Then use this to see if it matches what's listed in your account
If it is not a match, then this is not the key it is looking for.
If you set it up with school or work account, it is worth checking here as well https://aka.ms/aadrecoverykey sign in with your work/school email credential in that case.
Any chance your laptop was purchased used, or already set up for you? Or was it gifted? Or have you set it up with a different account at first? The key is stored with the very Microsoft account used to set up the computer for the first time, even if you had got rid of that account and set it up with a different account. So, if your computer was set up by anyone at the store you bought it from, it would be that person's account.
I assume you don't remember opting out of not saving it in Microsoft account, and saving it to a local file instead? That's another possibility.
If you can't find it at all, there's really no way to go around it. Bitlocker means business. If it can be bypassed, then it means the encryption is not working. Your only option is to do a clean install of Windows. In that case, you do lose your files. I am very sorry.