Not perfect, but could you get there with something like this? https://www.sweetwater.com/store/detail/CYS103--hosa-cys-103-y-cable-1-4-inch-trs-to-dual-1-4-inch-trs-3-foot
There’s likely different configurations of female/male connection points that could help it make sense.
Thanks for the suggestion, I’ll start with the Mooer pedal and see how it goes !
Something like this is always handy to have around.
Elektron AH+FX.
This is the best answer!
And the most expensive. 
If you have an audio interface like the Motu M2/4/6, you can use it in standalone mode and will have separate line out and headphone out. You can just use a USB power supply and then you don’t have to worry about computers.