I am trying to submit the form to add a mod vehicle. when I try to submit, it says that my 7z file name doesn't match my mod name, and it does. I don't if I'm doing something wrong. Please help haha

Actually that error points to the name you gave the mod inside the Vehicle editor. There you have to export it with the name "FZR-R".
https://youtu.be/9EPWaGraQfs?t=515