There is an approach that does not require you to redirect one of the "Users" folders. I don't know why, but I was unable to get that approach to work, and I found it was really messy to undo.
This REG file is based on the information compiled from this TechNet article, which discusses how to enable the Recycle Bin. The example maps the virutal Q drive to folder "OneDrive - Test", and enables the Recycle Bin on the Q drive. Change the paths and name to suit your situation.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\DOS Devices]
"Q:"="\\??\\C:\\Users\\Tony\\OneDrive - Test"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"RelativePath"="Q:\\"
"Category"=dword:00000004
"Name"="Q_Mapped_OneDrive"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\BitBucket\KnownFolder\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"MaxCapacity"=dword:0000c7eb
"NukeOnDelete"=dword:00000000
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\FolderDescriptions\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"RelativePath"="Q:\\"
"Category"=dword:00000004
"Name"="Q_Mapped_OneDrive"
[HKEY_CURRENT_USER\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\BitBucket\KnownFolder\{9147E464-33A6-48E2-A3C9-361EFD417DEF}]
"MaxCapacity"=dword:0000c7eb
"NukeOnDelete"=dword:00000000
If you only have one such mapped drive, then you can get away with the GUID {9147E464-33A6-48E2-A3C9-361EFD417DEF}. If you have multiple mapped drives, then each should be matched to its own GUID from your favorite GUID generator.