There are plenty of EQ plugins on the market. There are EQs that do nothing (transparent digital), and EQs that do too much (extreme distortion). The sits perfectly in the middle.
In 1965, engineer invented a multi-band noise reduction system called Dolby A-type . Its original mission was purely technical: solve the "hiss" problem of magnetic tape. The system split audio into four frequency bands, compressed them during recording (the "encode" stage), and then expanded them during playback (the "decode" stage) to squash the noise. The "John Lennon Mod" AudioThing Type-A -WiN-MAC-
You can easily turn off individual bands to recreate the "vocal trick" instantly. There are plenty of EQ plugins on the market