Qty Increment Buttons for WooCommerce not displaying even after stock is 200pc for a product

Qty Increment Buttons for WooCommerce :

Hi Guys , i am using OCEAN-WP Theme. I have a product lets say shirt with SKU:7943. Its inventory is 200 pcs for size XL.

Now , when i surf a single product page, qty increment buttons +,- do not appear.

however, for shirt with sku:8932 it has qty 20 in inventory, and for that the +,- button appears properly. i am not able to figure out why this is happening.

i checked sold individually label is unticked.

kindly help for woocommerce as in how to fix this issue