Is your feature request related to a problem? Please describe.
The vibration thing supposedly pops up on first game launch regardless if there is a controller enabled. This is fine for users who install the mod manually, but is not fine for modpacks.

Describe the solution you'd like
If a modpack has enabled the setting to make controllers opt-in, show that vibration prompt only when a first one gets connected and calibrated, in the same wizard flow.

for example, I'd make it a part of this process

after the calibration is done, you ask:

Would you like to also enable controller vibration support?
This will download a small helper program in the size of X MB. Vibration will be enabled for all controllers and can be changed at any time in controller settings.

Describe alternatives you've considered
Could make it a part of the calibration flow for everyone, not just those who set controller support to be opt-in

Additional context
You know what I'm referring to 😄

Writing this down for myself:
This is slightly difficult because the natives are currently loaded before initializing any controllers, and hotplugs expect everything to be initialised.