welcome to the forum,
rclone.exe copy \\?\Volume{68827449-de5e-46e5-b8b3-4962c7d84067}\files\file.ext d:\tmp -vv
DEBUG : rclone: Version "v1.67.0" starting with parameters ["c:\\data\\rclone\\rclone.exe" "copy" "\\\\?\\Volume{68827449-de5e-46e5-b8b3-4962c7d84067}\\files\\file.ext" "d:\\tmp" "-vv"]
DEBUG : Creating backend with remote "\\\\?\\Volume{68827449-de5e-46e5-b8b3-4962c7d84067}\\files\\file.ext"
DEBUG : Using config file from "c:\\data\\rclone\\rclone.conf"
DEBUG : fs cache: adding new entry for parent of "\\\\?\\Volume{68827449-de5e-46e5-b8b3-4962c7d84067}\\files\\file.ext", "//?/Volume{68827449-de5e-46e5-b8b3-4962c7d84067}/files"
DEBUG : Creating backend with remote "d:\\tmp"
DEBUG : fs cache: renaming cache item "d:\\tmp" to be canonical "//?/d:/tmp"
DEBUG : file.ext: Need to transfer - File not found at Destination
DEBUG : file.ext: md5 = 9afcb2d16863f2df14342a4143c7e45d OK
DEBUG : file.ext.vepevug9.partial: renamed to: file.ext
INFO : file.ext: Copied (new)
INFO :
Transferred: 4 B / 4 B, 100%, 0 B/s, ETA -
Transferred: 1 / 1, 100%
Elapsed time: 0.0s
that is correct for dos but there a number of workarounds, one of which, i mention in my guide about using VSS snapshots with rclone.
https://forum.rclone.org/t/how-to-enable-vss-for-rclone-on-windows/11675/1
mklink b:\falconer\vss\test /d \\?\Volume{49f7c0ee-485f-4a7f-85be-f5a55b15851a}\data
symbolic link created for b:\falconer\vss\test <<===>> \\?\Volume{49f7c0ee-485f-4a7f-85be-f5a55b15851a}\data