Multi-Mono-Plugins?

These little channel-config-tab does not let me choose a 5.1-channel configuration when I have a stereo-plug inserted.

Only “workaround” I know atm would be to insert 3 instances of my stereo-plugin, change routing manually on each, and then also make each parameter setting manually on each, one after the other (I cannot link plugins on same channel, can I?).

Unfortunately this workaround does not fit into a workflow, because when I make adjustments to one plugin-instance I only hear this on 2 outs of my 5.1-Channel, unless I copy it to the other plugins. And then being in complex automation process…not suitable. In addtion to that I burn up 3 of my only 8 inserts for one plugin.

Is there any way like in PT?