I'm quite late, but anyway; here you have the first experimental release for 1.20.3!
The only missing mod is Ferritecore as of now.
Also, some config changes are included here (they're coming to the other mc version in the next release), so if you find some bugs please report them on Github.
Thunder - 1.0.6+fabric-1.20.2 -> 1.0.7+fabric-1.20.2
Changed
- dynamic-fps-3.2.0+minecraft-1.20.0.jar -> dynamic-fps-3.2.1+minecraft-1.20.0.jar
- fabric-api-0.89.2+1.20.2.jar -> fabric-api-0.89.3+1.20.2.jar
- ImmediatelyFast-1.2.5+1.20.2.jar -> ImmediatelyFast-1.2.6+1.20.2.jar
- modernfix-fabric-5.7.3+mc1.20.2.jar -> modernfix-fabric-5.7.5+mc1.20.2.jar
- threadtweak-fabric-1.20.1-0.1.0.jar -> threadtweak-fabric-1.20.2-0.1.1.jar
Thunder - 1.4.3+fabric-1.20.1 -> 1.4.4+fabric-1.20.1
Changed
- dynamic-fps-3.2.0+minecraft-1.20.0.jar -> dynamic-fps-3.2.1+minecraft-1.20.0.jar
- fabric-api-0.89.0+1.20.1.jar -> fabric-api-0.89.3+1.20.1.jar
- ImmediatelyFast-1.2.5+1.20.2.jar -> ImmediatelyFast-1.2.6+1.20.2.jar
- modernfix-fabric-5.7.4+mc1.20.1.jar -> modernfix-fabric-5.7.5+mc1.20.1.jar
- threadtweak-fabric-1.20.1-0.1.0.jar -> threadtweak-fabric-1.20.2-0.1.1.jar