Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
A Microsoft 365 subscription, if it is not pre-installed on a PC, is not device specific, it is linked to your Microsoft account and you can install the Office apps on more than one device at the same time, are you logging into the new device with the exact same Microsoft account as you used on the old device?
Log into your Microsoft account on this link, do you find two separate Microsoft 365 subscriptions listed on your account?