Is this a genuine Valentino Garavani bag?

No. The Divina SA belongs to Valentino's fashion line, not the Valentino Garavani luxury collection. Expect fashion-grade materials and construction rather than couture-level leather and hardware.

Is the material real leather?

It is faux leather. That makes it easy to wipe clean and keeps it lighter, but it will not age or patina like real leather and can crease or peel with heavy use.

Can it be worn crossbody?

It is a top-handle bag and does not come with a shoulder strap. Carrying it crossbody would require a separate strap and attachment points it does not have.

It holds daily essentials such as a phone, wallet, keys and a small makeup pouch. The single inner pocket is best for cards or a phone, so larger items share the main compartment.

How should I care for the beige faux leather?

Wipe it with a soft damp cloth and avoid harsh cleaners. Store it stuffed and in a dust bag, and keep it away from dark denim, which can transfer dye onto light faux leather.