Microsoft are not 'scrapping' Outlook 2010. Support was withdrawn in 2020.
it regularly blocks emails from other providers and you don't even know they have been blocked . It blocked a whole server in one instance !
Microsoft have via Win 10/11 installed NEW outlook which blocks older outlook and directs all mail through itself. It also removes the existing calendar and replaces it with a useless "new" one. You CANNOT remove the "new" outlook and cannot prevent it installing! It is causing massive complaints and issues with IT savvy users and companies admins etc across the web. unless you gave win 8 or win 7 then you cannot keep older versions of outlook running ... it is nothing to do with "support" being withdrawn . It is linked to windows Mail your windows account .
Just to clarify, are you referring to Outlook.com webmail ie using a browser or Outlook the stand alone email client?