Mixer Musescore 4.5.2

Dear,
It is possible to bring the Mixer old functionality present on version 3.6.2 where it was possible to assing the MIDI channel into every Part (Instrument) into version 4.5.x?
That functionality was very useful especially working later on with exported MIDI file. Lack of that option generates the MIDI output where a few Parts/Instruments are being assigned into same MIDI chanel. That is not very welcome and makes such exported MIDI file useless. Each Part/Instrument shall be exported into separate MIDI channel to let develope the instrument tone separately. See the snapshot of Mixer from version 3.6.2 enclosed.
Best Regards
Adammus