Thank you for taking the time to visit the Community to post your question, although I apologize that you have not received a response.
When syncing to the mobile app, you may add or remove an account from syncing. However, you may not limit or extend the transactions that are dispalyed.
If you have not done so already, I would suggest taking a look at the information and following the steps outlined here.
Please let us know if these steps answer your question.