It will not fit a Yari, boost or none boost.
I suspect you’re right, the differentiator seems to be the ‘chassis’ the Yari is in essence a Lyrik with lower/older spec MoCo damper and uses the Lyrik Chassis inc the CSU.
If you want to upgrade to a Charger on a Yari I think you’ll need the Lyrik Charger damper which is part number:
11.4018.009.077 for the RC (whether this is better than a MoCo who knows, it seems to be an OEM fork, I’ve never seen them sold)
Or
11.4018.009.078 for the RTC3
I can’t find any for sale on-line but if anyone is interested I’m planning to drop a line to Loco to see if they can supply/fit them.
Or possibly buy the Pike damper and buy a Lyrik top cap, might be cheaper over all.