Meteor Client spans across major Minecraft releases, though you must use the specific .jar file corresponding to your game version from the Meteor Archive :
Meteor Client is actively updated to support the latest versions of Minecraft while maintaining archives for older releases. Minecraft 1.21 - 1.21.x Meteor Client 1.21- 1.20.6 -- 1.16.5
Kiran’s hand hovered over his mouse. This wasn’t anarchy. This wasn’t griefing. This was extinction-level control . Meteor Client spans across major Minecraft releases, though
Use Meteor 0.5.7 . This version requires Fabric for 1.20.6 and may need additional "rejects" or addons for expanded functionality. This wasn’t griefing
By keeping all three versions installed, you can switch between servers or even different regions of the same server (if it allows cross-version join) without missing any exploit window.
Download the installer for your specific Minecraft version from the official Fabric website.