MONSTR provides up to six bands of stereo width control to correct mix issues or use for creative effect.
Available for Windows, macOS, and Linux as a VST3 and Audiounit
https://workupload.com/file/yE2yHAfUx39
https://github.com/jd-13/wea-releases/releases/download/monstr-v2.1.2/MONSTR.v2.1.2.zip