Adjust Encounter Tier for Mech fights?

[Markimedes]

So I've set up an encounter where my PCs have mechs, but they're fighting regular creatures. My understanding of the rules, is you would treat the CR/XP as 3 tiers lower if they're in mechs. I've attached an image showing what I'm referring to, where it shows as a CR 11 battle, granting 17,600 XP.
Mech Encounter Tier.PNG

Is there a way to set this to "Mech Encounter" so when I drag this into the party XP tab it will reward them properly? Or is this not yet implemented and I'll need to calculate CR8 XP grant it manually?

[superteddy57]

No it's not implemented