Psionics involve the use of the mind to alter or command reality, typically through some understanding of a deeper truth about the universe or command over a fundamental law of reality.
It’s pretty cool, but I have trouble thinking of media where it takes a prominent role. The few examples that come to mind are:
Star Wars - The Force Mass Effect - Biotics/Element Zero technology Stellaris - Spiritualist Ethos Warhammer 40k - Psykers/Orks
What are some other examples of psionics in Sci-Fi?
Might not be relatively popular, but the psionics of the novel/anime Shin Sekai Yori are central to the plot and are portrayed in a pretty interesting fashion.
Foundation is another (more traditional sci-fi) work which also focuses on psychic people as a central plot point. The book series and TV series are very different, but I’d say each explores the idea well.
For video games, Control is another one I haven’t seen mentioned yet. It’s based on the SCP collaborative fiction project. Exposure to objects of power awaken the protagonist’s (and other characters’) latent psychic abilities.
The Foundation book series doesn’t really start into psychic stuff until the second book, Foundation and Empire, with the Mule. Big turning point of the overall plot because of him. I wouldn’t classify the Second Foundation as psychics as much as having the ability to predict patterns mathematically and socially influence populations. The fourth book gets into some other psychic influencers.
I’m okay with the TV show parts I’ve seen, but it is vastly different in its approach (and so more psychic type things going on). I knew a visual version would have to take a lot of liberties as the books just don’t translate well in the way they’re written.