The Chinese Arkana (LJH) and Korean Renault-Samsung XM3 (LJL) are based on the CMF-B platform; the Russian Arkana (LJC) uses the older B0 platform.
https://europe.autonews.com/article/20180829/ANE/180829757/renault-expects-arkana-s-coupe-styling-will-stand-out-in-crossover-market
https://www.largus.fr/actualite-automobile/renault-arkana-2021-les-premieres-photos-officielles-en-coree-10249397.html
https://www.formacar.com/en/news/view/25017.html
The new Arkana model will ride on Renault’s B0+ platform. It is a revised B0 architecture that underpins models such as Renault Captur and Renault Duster.
It’s based on a heavily revised version of the B0 platform that underpins the Russian-market Renault Kaptur small SUV as well as the Dacia/Renault Duster. The new platform will be called B0+.
Assembled in the Renault Samsung Motors factory in Busan, Korea, the Samsung XM3 is based on the modern CMF / B technical base of the second generation Renault Captur.
https://nissanalliance.com/nissan/2020-renault-arkana/In China, it will be called the same as in Russia, but the specs will still be different. Among other things, the Chinese SUV benefits from the new CMF-B platform, whereas its Russian counterpart makes do with the outdated B0 architecture, only slightly spruced up for the model.
https://europe.autonews.com/article/20180829/ANE/180829757/renault-expects-arkana-s-coupe-styling-will-stand-out-in-crossover-market
https://www.largus.fr/actualite-automobile/renault-arkana-2021-les-premieres-photos-officielles-en-coree-10249397.html
https://www.formacar.com/en/news/view/25017.html