Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
there is no native process available to move a Microsoft 365 subscription from one Microsoft account to another account.
Usually, you could cancel the subscription to get a pro-rata refund, then take out the subscription on the other account, however, because the subscription on Account 1 has now been pre-loaded for two years up to 2028, do not cancel the subscription, you risk loosing both subscriptions and only receive a refund for one subscription.
This forum is just a user to user forum, no-one here has any account access, you will need to contact Microsoft Support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option