[…] As convenience stores lose share to on-demand deliver apps, however, they are looking to gain share from other categories — namely, restaurant and grocery. Leading players have been expanding their selection of prepared, hot food, with the National Association of Convenience Stores noting that nearly 1 in 4 sales in the industry come via retailers’ food service businesses. That share has risen dramatically in the past decade, up from 16.8%. Plus, major convenience store chains have also been touting the strength and growth of their grocery businesses. […]