Is "Virtual Family" a Nintendo Game? No—It's by Last Day of Work

No. Virtual Families (and Virtual Families 2: Our Dream House, 3) are developed by Last Day of Work, an indie studio specializing in mobile/sim games.

Platforms

• iOS (App Store)
• Android (Google Play, Amazon Appstore)
• PC (Steam, Big Fish Games – older versions)
• Playable on Switch/3DS only via their respective eShop apps (not native, not Nintendo-made).

Gameplay

Real-time life sim: adopt a person, guide career/marriage/children, decorate house, manage generations. Runs even when closed.

Nintendo's life sim is Animal Crossing; Tomodachi Life (3DS) is closer but distinct.