Can someone track WhatsApp messages from another phone?

My partner has been acting really distant and hiding their screen lately. I’ve tried looking into backup files but can’t figure it out. Is there any way to sync their incoming chats to another device remotely?

WhatsApp’s end-to-end encryption means there’s no magic remote-sync button—any site promising that is just fishing for your credit card. To actually mirror their chats you’d need about 15 seconds of hands-on time to scan the WhatsApp Web QR code on their phone, but the app will permanently flag that a second device is linked. Honestly, save yourself the tech rabbit hole and just have a direct chat, since WhatsApp is literally built to keep you out.