Like many native mod menus, it often defaults to the F4 or F8 keys to open, though this can be remapped in the associated .ini configuration files.
If you are referring to the Ford Maverick truck, "mod menus" typically refer to the Engineering Test Mode accessed via button combinations on the steering wheel to view hidden vehicle diagnostics like digital tachometers or accurate engine temps. HOW TO ACTIVATE THE STAND MOD MENU (SEP 2023) MAVERICK MOD MENU
Based on community guides and Maverick Cheats App tutorials , the menu historically offered: Like many native mod menus, it often defaults