Might depends on the restaurant. My family frequents a German restaurant for family holiday meals. The extent of the service they provide is strictly bringing an extra plate and silverware. And it’s an $8 split plate fee.

Many restaurants charge a “split plate fee”. If you order something and want to share it with your partner they’ll bring you an extra plate but charge a fee. Have a link: https://frugalreality.com/split-plate-charge/