can anyone tell me when it might be possibly updated?

oof, well, who knows, it al really depends on how the official web that translates it uploads the traduced versions, and since they haven't post in a while there is no assurance :(. But you can read the novel in https://exiledrebelsscanlations.com/the-grandmaster-of-demonic-cultivation/ and then read the original manhua in https://www.kuaikanmanhua.com/web/topic/1749/, even though it's in Chinese you could still figure out what's happening if you had already read the novel which i recommend a lot!

thank you veryy much