Hello, I hope you're having a fantastic day.

Sorry to be a bother, but since you closed the former I was reluctant to reply, thinking you might not see a reply on a closed report and nobody likes opening closed posts.

So I've looked further into the issue regarding the mod not making the client, server or common .toml files.
I've restarted a fresh world, I've booted up the game with only optifine, performant, out of sight and dragonmounts legacy.
I unfortunately have to use optifine at the very least because of my system limitations.
I've even switched between opening minecraft as administrator and regular, but nothing seems to trigger the creation of the files.
I'm absolutely at a loss of ideas here, aside of one.
As I understand it, datapacks take priority for making changes, right?
How would I go about making a datapack for changing the flight mechanics?
Is it datapackname/data/dragonmounts/flight.json or something..? Or is there a different name I should give the .json file?
I'm desperate to finding a fix for this since clearly nothing i do by normnal standards seems to work.
All the while other mods seem to be making their associated .toml files just fine.
Oh and I've also updated Forge, in hopes that that might fix it, though it didn't.

I hope to hear from you soon.
Best regards.

Currently I've prepared a datapack for testing to see if it'll make changes.
Dragonmounts->data->dragonmounts(Last folder containing the three missing .toml files.)

Well, that didn't work.
I have no idea how to fix this now, or even what to try.

How do I propperly make a datapack to change flight?
In previous versions, before the .toml files were a thing, it was possible through datapacks.
Could you please tell me how to make a datapack to change flight mechanics?
What are the propper file orders and names?
What does the json file need to be named?

Please, I just want to enjoy the mod and I'm out of options on how to fix the .toml files not being created because no other mod has issues with doing so, and i can't even imagine where to begin digging for a culprit.
My last hope is making a propper datapack, and I can't seem to make a working one without some guidance.

I have not touched the 1.16 code at all, but I think this week I'll finally dig into it to try fixing this.

Any insight on the issue?

Unfortunately the older 1.16 versions of the game did not produce configuration files. At the time, I was in the middle of working on developing those.

Also, at the time, the flight mechanics used at the time would also disallow any sort of different flying control.
1.18 was the game version I took advantage of to rewrite the mod down to it's core (apart from the model and animations)

Which also allowed me to introduce the configuration files in a way that wouldn't induce headaches on both me and users.
I apologize for inconveniences and I see you've done extensive research and tests, and I wish I could help more.