It is in nut-06, see the specs!
Discussion
Oh shit you’re right, why was i looking for a MPP field lmao. GM 🫡
Wait, so is it nut 6 or 15? 
15 is MPP
I'm checking cashumints.space, at a glance none seem to support nut-6 and even the two mints pictured in the video I'm using I'm not seeing the option for multi mint payment, trying invoice or lightning address, experimental feature is enabled...
What am I missing?
They all support Nut-06. That’s the meta info Nut. Nut-15 is multiNut payments.