No, because this is a single licence. With a subscription this would be possible, as you would then always receive the latest features. Here is a suitable article: https://support.microsoft.com/de-de/office/wie-kann-ich-office-aktualisieren-ee68f6cf-422f-464a-82ec-385f65391350
I would put it differently. Fortunately, another one that is not only available by subscription. Hopefully this version will be around for a long time.
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Hello, you had to create a Microsoft account for the Office package. You can simply log on to the new MAC with it. The old licence will be deactivated.
For Outlook you would have had to buy the "Home & Business". What is included is described in both articles.
You could also buy the subscription solution Microsoft 365, which includes Outlook for Single and Family. However, this is an annual fee.
Legally only permitted on one device. Language must be selected during installation and cannot be changed afterwards.
But I have now switched to Linux and can also manage with free LibreOffice.
In principle this is possible (not tested on this version). If necessary, you can call the Microsoft service to free the pairing with the old machine. However, I don't know if it is possible to switch from Windows <-> Mac.