You can manage your inventory inside the Products menu, on the Stock tab. There you will have access to the amount of available items, organized by colour and with the possibility of filtering the products for a better view of your inventory.
In the Kyte POS and Kyte Catalog apps
In the Products menu, select the desired product
Activate the Manage stock for this product button
Insert the number of items you have on hand
Set a minimum quantity
Click Save