Where to set Film back

I’m new to Mocha and watched multiple clips on youtube
But I dont think Mocha can’t set the film back like 3D DCC Maya right?
I’m tracking a 1080x1920 footage recorded from iphone and when bring the camera back to Maya
the camera aperture is wrong so the ratio is off.
Am I missing somewhere? or Mocha doesnt have that feature?

You can calibrate the lens, but we don’t set the focal length or aperture in exports.

Are you just exporting a camera solve FBX or specifically an alembic mesh?

Since the only option for exporting camera solve is fbx then yes I exported in fbx to Maya
That:s so sad that i cant use Mocha
I hope you guys can update this feature in future