RM 2.2 Proper Last-Modified date for download URLs

[Slion]

Is is possible to have the Last-Modified header date set properly on resource download URL?
Looks like it is set to the current date rather than the actual upload date.
See for instance:

https://slions.net/resources/fulguris.10/download

 

[Slion]

Any reason why ETag is usable for cache check but not Last-Modified date?
See: https://github.com/Slion/Fulguris/issues/253#issuecomment-1149084209