In order to track a purchase request (what is the status of your purchase request), please, follow next steps:

1. Go to the left-side menu and choose Purchase request. 

2. Choose the required purchase request.

3. After you have created a purchase request, you want to know, where is your purchase request, what is the status. So, please, look at this statuses:
3.1 Pending status means, that your purchase request waits for approval by the responsible manager;

Approved status means, that your purchase request was approved by the responsible manager;

Rejected status means, that your purchase request was not approved. It will not be purchased.
Besides, once your purchase request was approved, in case your company has a feature of a purchase order - mode on, it must be transfigured into
the purchase order.
Then, you can see such statuses of your purchase request (the purchase order already):
sent (means, that your purchase request=purchase order has been sent to the supplier and you can wait for the delivery);
waiting for purchase (means, that your purchase request=purchase order is in the process and waiting for purchase);

complete (means, that your purchase request=purchase order has been delivered and purchased, so no one can edit it);
received (means, that you have received your purchase request=purchase order);
cancelled.
Recommend you to filter your purchase requests by statuses.