Excuse me, is this the other shore flower? My uncle's small garden grew two plants inexplicably, without leaves, only stems and flowers. Please answer responsibly,

Yes, this is commonly known as the other shore flower. It is a common ornamental plant in Amaryllidaceae, and the plant name is Lycoris radiata. We also call it dragon claw flower here.

The leaves are linear, drawn from the base after flowering, withered in summer, and drawn from August to September. Therefore, there are no leaves when flowering, and there are no flowers when there are leaves.