The invoices uploaded from your suppliers might have the difference between amounts and count between GSTR-2A and GSTR-2, make sure to check
Invoices under GSTR-2 will start showing up on summary screen as well as inside GSTR-2 only after an action is taken on the invoice like accept, modify, or new invoices are added by the receiver. Invoice rejected will be deducted from the count and amount before summary can be updated. Please start looking at invoices uploaded from your suppliers for seeing the count and amount of ITC available. There can be a difference between amounts and count between GSTR-2A and GSTR-2 for this reason which is as per the expected behavior on the portal.