I'm thinking handle that exporting to other formats than MIDI in the future.
However, even the basic specifications of Lovely Composer itself are still in the stage of many changes, so there is a problem that the more types of supported formats, the greater the cost of development and the slower development.
In the case of GB Studio, there seems to be a way to convert from MIDI to mod using a tool called OpenMPT. Please try using a combination of multi tools at the moment.
Music | GB Studio-https://www.gbstudio.dev/docs/music/
I would like to include .mod as future candidates and consider them again at just the right time.