To Stock in Products Individually we are required to follow the steps given below.
Step 1 : Click on Inventory
Step 2: Search for the product in the search bar which you want to stock in
Step 3: Click on the stock IN option on the right hand side of the dashbord
Step 4: Enter the quantity and Click on Add Quantity
Step 1 & 2 are shown in the above Image
Steps 3 & 4 are shown in the above Image