Yes. The specific reasons for your decision are on the decision screen in your Split Pay account and in the email we send with your decision. If you reapplied right away after your first decision, you'll see your reasons — and get the email — after that second decision.
The reasons on your decision are the complete explanation — there's no additional detail behind them, and no separate review to appeal to.
What matters most is what you can do next: you can reapply once, right away, by connecting at least one new bank account. New account activity is the only thing that can change a future decision, though reapplying doesn't guarantee approval. If your reapplication is denied, your Split Pay account shows when you can apply next — usually 30 days out. Go by the date your account shows.