A Magento 2 store owner may want to limit the number of items to be purchased per order due to limited stock or some selling strategy.
Attachment 12869
The condition to Force Only One Product Per Order in Magento 2 has to be configured programmatically as the default Magento 2 does not provide this option.
For more details, visit https://meetanshi.com/blog/force-onl...gento-2-order/