Do I need to format a new Usb intended for ipad use?

To be recognised by iPadOS, the attached USB storage device must be formatted to FAT, FAT32, exFAT, APFS or HFS+ with a single partition. Microsoft NTFS and other proprietary device formatting are not supported by Apple devices.

Formatting and partitioning, if required, must be performed using a separate computer; iPad does not provide any facilities to format an external storage device.

Unless explicitly intended for Mac computers, most USB storage devices will be formatted during manufacture as FAT32 or exFAT - these storage formats being largely universal between computers.

that depend on what filesystem the usb stick is formatted in currently, if it's ms ntfs then you probably need to