I work closely with our Data Lake team, they use our Adobe Raw Data feeds to populate the lake... I have never seen a "Device Type" field in that data; nor do I see it documented anywhere as being part of the feed.
https://experienceleague.adobe.com/docs/analytics/export/analytics-data-feed/data-feed-contents/data...
In Adobe Analytics, the "Mobile Device Type" field defers specifically to identify groupings of devices (the exact rules of those mappings doesn't appear to be disclosed anywhere in the documentation)... Desktop devices, and I would imagine other device types that don't sort of relate to the existing groupings would fall to "other".
The data you are showing relative to the Raw Data, are you sure that isn't being processed by your team based on User Agent string, which is a part of the Raw Data Feeds?
If you are trying to map that data 1 to 1 with Adobe's groupings.. I am not sure you will be able to... without Adobe's mapping rules documented.. plus, those rules may be updated frequently to adjust to new devices as they come into use...
The only thing I can think of (and this would come at a cost) but you could get Adobe to potentially set up a Vista rule to set the same value from the Mobile Device Type dimension into a custom prop or eVar so that you can have the data as part of your Raw Data exports.... I am not sure if this would be worth it.... I can't see any way to leverage that information during processing rules which you could control either...
