One that actually answered my question.
post a link to a some raw (m43 camera w/ 43 lens in question) I will do the work you, to spare you brains
PS: don't bother... imaging resource has for example E-M10 Olympus raws shot with 43 50mm macro (Olympus 50/2)
dump from converted DNG shows
Opcode: WarpRectilinear, minVersion = 1.3.0.0, flags = 0
Planes: 3
Optical center:
h = 0.498276
v = 0.500000
Plane 0:
Radial params: 1.000000, 0.000166, -0.000141, -0.000056
Tangential params: 0.000000, 0.000000
Plane 1:
Radial params: 1.000000, 0.000000, 0.000000, 0.000000
Tangential params: 0.000000, 0.000000
Plane 2:
Radial params: 1.000000, -0.000055, 0.000308, 0.000040
Tangential params: 0.000000, 0.000000
indicates both geometry and LaCA corrections /
but numbers shows that Olympus 43 50/2 Macro naturally requires very minimal correction/ performed by ACR/LR (compatible versions assumed)... however that might not be the case for a different m43 camera... you need to check raw files, but that's too complex for you