[HELP] Is there a way to edit handling.meta by ingame menu?

[cadmium]

Yes,natives for this exist:

Cfx.re Native Reference

And here is a example how to use them:

[Release] [Example] Vehicle Handling Editor

First! Note that this resource is an Example and was not designed to be used as a handling editor for your server. It is also absolutely unfinished and possibly unstable. Research: Apparently some of the handing properties require research to how/if they work, from my testing, things like Centre of Mass offsets, Mass and maybe some other values don’t properly work, so beware of that Functions: I added a few functions to make setting and getting handling data easier for me, you can of course …