Does isupplier has a option for the PO to be only acknowledged by supplier user before accepting or

Question - Experts, i want to understand if iSupplier has a feature wherein when a PO is created by buyer, the supplier through the isupplier login can only acknowledge a PO and accept/reject/change request later?

I understand that when i click on the Acknowledge button selection a PO, it takes me to a page wherein i either have to accept, reject or send change request. However, as a supplier user i might want to just acknowledge a PO today and act on it tomorrow or later.