If it was that easy, they would have done it by now. It's what was announced a few months ago and we're still waiting for it. For now we can only speculate as players are being kept in the dark. They seem to have ran into issues with this update as it has been posponed to an undisclosed time. If it's not possible to update the server to a newer version in a reasonable period of time, I'd prefer to play on a new server than to wait more months. Depending on the time it takes for this promised update to come out, I know a few players, myself included, that are starting to get bored of the actual one.
Day 18th July 2022 asking for a new version of Skyblock with content 1.18 or higher. On behalf of the entire community. Thanks