In the the First Order and the Resistance. Knowledge of the Force is scant, although some areligious remnants persist, such as the casual use of the phrase "May the Force be with you," which is a carryover from its use by the Rebel Alliance.
While the Force is believed by its adherents to be all encoming, there is a relatively clear demarcation between its positive and negative aspects and the applications thereof. Force lightning is one of the most malicious of dark side powers, for which there is no corollary in the less offensively-minded light side.
Throughout the Star Wars saga, this particular dark side power has only been wielded by a select few, most notably Palpatine in both the original and prequel trilogies. While there was only one proper Sith in the sequels (and even he was a clone), Force lightning appeared multiple times.
Snoke
The first use of Force lightning in the sequels occurred in Star Wars: The Last Jedi, when Supreme Leader Snoke used it briefly used it to reprimand Kylo Ren. Along with a musical reprise in the score when he interrogates Rey, this does a lot to inspire comparisons to Emperor Palpatine's presence in the original trilogy, making liberal use of preexisting signifiers in order to efficiently portray Snoke as more threatening. That being said, Snoke's quick zap is much more restrained than Palpatine's barrages, which perhaps relates to his role as a mere pawn in the Sith Lord's plan.
Rey
After struggling with her natural connection to the Force for the first two films, the character's inclination toward the dark side first visibly manifests in Rey accidentally uses Force lightning when fighting Kylo Ren in order to keep a First Order transport grounded. This shows the power inherent with being Palpatine's granddaughter, but also the hereditary darkness that supposedly exists within the bloodline. However, the apparently disastrous consequences of Rey using Force lighting - she believes that Chewbacca has died - play no small part in reaffirming Rey's commitment to the light.
Palpatine
Palpatine was responsible for the very first appearance of Force lightning in Palpatine's Force lightning scarred the latter, the Sith Lord is once again undone by his own evil methods when Rey too turns his assault back against him, assisted in spirit by "all the Jedi" from Star Wars' history.
