Controller Support

Hi all. I have a question around controller support in PC games. Do most games now play natively with the relevant controller protocol, or do they just convert the inputs from keyboard and mouse? So for example, if I play a game on my Xbox or PlayStation, all of the minor details such as aim assist and feel of the analogue sticks are programmed for that game and controller. If I then play the same game on PC, would these inputs be identical? Most first person games that use controller on console have some level of aim assist, and if this didn’t translate to PC it would make the game difficulty very different.