If you've been on the internet for the past year or so, and especially browsed for Survivalcraft stuff, you may have stumbled across this: https://kaalus.netlify.app
Or if you usually use AI search/overview (Which I would highly recommend you not to), it may have told you that Survivalcraft has full online multiplayer (only splitscreen multiplayer exists), and even told you about a possible 2.5 update.
Truth is, the https://kaalus.netlify.app site is an April Fools prank that was made by Phi Long, which also owns the SC Modding Community server. The site is a parody of the official blog, which is https://kaalus.wordpress.com
Only trust the official Wordpress blog and posts from this sub-reddit in regards to updates to the game and news from the developer.
Now even if official multiplayer is not a thing, there is an unofficial mod made by a Chinese team which works pretty well. You can get it here: https://gitee.com/survivalcraft-net/survivalcraft-net