I don’t know Olympus software? If it offers presets to edit photos and allows you to work in .png or Tiff (which you will have to convert to .png).
I made haldClut with G’Mic’s film simulation and also with DxO’s FilmPack (made in Tiff and then converted), the method is always the same :
load a haldclut-identity;
apply the preset
and save.
The advantage of FujiFilm’s software is that it provides the presets to be applied to the RAW to have the presets internal to the case.