No, Jack Quaid is not playing The Human Torch in the next Fantastic Four movie
The Boys and Star Trek: Lower Decks actor would like everyone to donate money to help people impacted by the strike, though

Twitter (which is what it’s called and you sound silly suggesting anything else) is a bad website that can barely handle the basic functionality that its users have come to expect, but if there’s one thing you can always count on from the social media platform, it’s utterly baseless casting rumors about upcoming superhero movies that are designed to generate Twitter engagement/manufacture phony “clout”/drive people to a YouTube page full of clickbait-y thumbnails and more baseless casting rumors. We survived it with Spider-Man: No Way Home (though some of those rumors were right, in a “stopped clock” way), we survived it with Doctor Strange In The Multiverse Of Madness, and damn it, we’re also going to survive this current one—which is about Marvel Studios’ Fantastic Four reboot.
For the past… millennia? Who knows how long it’s been, but for the past unclear length of time, Twitter “insiders” with “insider” knowledge have been sharing rumored cast lists for the new Fantastic Four, all of which exclusively contain Big Name actors (even though newcomers and relative unknowns do occasionally get cast in major Hollywood productions). The hot Fantastic Four rumor for a while was that Adam Driver would play Reed Richards and Margot Robbie would play Sue Storm, both of which seem like nonsense, but, for some reason, the rumorers have really worked themselves up into a frenzy this week by insisting that Matt Smith will be Reed (terrible), Vanessa Kirby will be Sue (fine), and that Jack Quaid will be Johnny Storm/Human Torch.