Legacy Console *Mini Game* worlds to PC help

I am trying to see if I can convert the Battle/Glide/Tumble mini game world from the legacy console editions (more specifically the Wii U edition) to either a Bedrock or Java save. I've played Minecraft with CEMU emulator so getting save files isn't the problem, but I noticed there are actually no save files of the mini games, only my personal worlds.

I've messed around with MCCToolChest a bit and was able to succesfully convert a normal world to PC but, as mentioned before, since there are no (visible or available) save files of the mini game worlds, I wasn't able to do that yet.

I'm wondering if the mini game world are in a different file/format or that they are stored somewhere entirely different. CEMU emulator was never connected to the online network, so it couldn't have been stored online, because I was able to continue playing in a previously created mini game world.

It's very hard to google on this, too, so I was wondering if there is already any info / progress on this. If this is flat out impossible, I'd love to hear that, too, but there has to be a way somehow.

I have posted this question to this Reddit thread as well: https://www.reddit.com/r/feedthebeast/comments/r4top2/legacy_console_mini_game_worlds_to_pc_help/

Thanks in advance!