No Phase Invert In MixConvert?

I’m still stumbling across shortcomings of the latest & greatest version of Nuendo compared to previous ones: Is there really no phase-switch any more in MixConvert 6? :open_mouth: How am I supposed to create a proper Left-minus-Right mono setting for monitoring, then?

Is there a way to replace the cumbersome*) MixConvert by an older version or a 3rd-party plug-in?

*) -> https://www.steinberg.net/forums/viewtopic.php?f=291&t=159354&p=855773#p855773