An update to Microsoft 365 apps for enterprise, aka Office Pro Plus, means that Word, Excel, and PowerPoint now suggest files which users might want to open. Although the traditional Most Recently Used (MRU) list isn’t being replaced, the set of suggested files is device independent and based on other activity than just simple file opens.
https://office365itpros.com/2021/05/14/how-office-suggests-the-most-relevant-files-to-users/
