Story where in the future mankind live in new planet whether it become futuristic (like Red Rising series) or revert back to swords and gun (like Rakuin no Monshou - their ancestor depleted the spaceship finite recources and technology by constant war).
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I don't think I've read anything like that, like at all. There's been some post-apocalyptic stuff on Earth where technology regresses later but not on another planet.
Assuming you don't just mean spacefaring sci-fi, you could try https://www.royalroad.com/fiction/63230/project-messiah-rebuilding-humanity-kingdom-building. It sounds like what you're looking for. Its okay, but I kinda lost interest in it myself.
Warlock Series by Christopher Stasheff The Broken Empire by Mark Lawrence Safehold Series by David Weber Super Gene Pocket Hunting Dimension Godly Model Creator The World Online
Red Mars, Green mars, & Blue Mars (Mars trilogy series) by Kim Stanley Robinson Just recommending this series is technically a major spoiler because this isn't revealed until the third trilogy. The True Game series by Sheri S. Tepper is a trio of trilogies (3 x 3 = 9 thin books total) is mostly out of print, so you'll have to search for them. 1st trilogy - featuring Peter - Kings Blood Four - Necromancer Nine - Wizard's Eleven 2nd trilogy - prequel featuring Peter's mom - The Song of Mavin Manyshaped - The Flight of Mavin Manyshaped - The Search of Mavin Manyshaped 3rd trilogy - featuring Peter's girlfriend - Jinian Footseer - Dervish Daughter - Jinian Star-Eye
Sorry for being late. I haven't read any recent fiction with mankind on another planet. Not sure if the series below fits. Spoiler: Major spoiler for a Brandon Sanderson book. Do not read if you do not want to be spoiled. Stormlight Archive takes place after humans moved to a new world. Not a book, but Trigun Stampede does fit the criteria. Dune by Frank Herbert.
You can try the Foundation Trilogy. They don't literally revert to swords and guns but they definitely revert.