You need to unlock the throttle with the idle detent key (default is alt-i). So once the rpms on startup reach 25%, move the throttle forward then hit the key and the throttle should jump forward.
The core BSM4 does not have these cockpits, and a part of them are illegal here because they are stolen stuff. There is a partially finished F-14 cockpit in my Korea '80s mod, but you can’t find that any other 3rd party theater. F/A-18C cockpit what may you saw will comes with BMS4 4.33, likely some test VFS have it. The F-14 pit of Electronicbattlefield is not permitted here.