Currently the velocity only supports s12 packets, this will not work on hypixel since they use s27 packets. The difference between the two is one renders an explosion and adds to the motion instead of setting it, while the other only sets the motion. Inside of the S27PacketExplosion class there are three floats that determine the motion values, they are field_149152_f, field_149153_g and field_149159_h. Just make these public and change the values the same way you did for the s12 packets

Here are the lines to make public https://github.com/danny-125/Peroxide/blob/f3542effa05916656656388a90da460186d13d17/net/minecraft/network/play/server/S27PacketExplosion.java#L21

And here is where you should change the values https://github.com/danny-125/Peroxide/blob/3dcef04ba7c00cb925ddab6c127c20ec84205353/me/danny125/peroxide/modules/player/AntiKnockback.java#L24

China hat is the best module, here is the code if you don't/can't make it. I give you permission to skid it since I believe that every client should have a china hat 😎. You don't even need to credit me, seeing china hat is enough for me to be happy 😄

https://gist.github.com/NathanKassab/b8e320cc1c3c5a60dbc5808f2547b800

In the killaura module you send a c02 packet and then call another method that sends another c02 packet, that is not normal behavior and may flag some anticheats

Removing this line of code should fix this

https://github.com/danny-125/Peroxide/blob/0006b08f0a792be2321ed2ae306f419543dd4c5f/me/danny125/peroxide/modules/combat/TempKillAura.java#L164

no blur? no hypixel bypai? no 3D render modules? removed all my commits because you know i coded 90% of your client? no new base? terrible visuals? why stick onto base i made? no china hat? no color picker? no scripting? danny come back i loved seeing you get mad 🙏, btw for anyone reading this, this is basically my client i coded most of it, its kinda shit but i have a new one anyway