Step Up blocks smoothly instead of Auto Jump. Simple and fast mod.
Client Sided mod
This is basically the same function as https://www.curseforge.com/minecraft/mc-mods/stepup but now on updated Minecraft versions (1.18+), however the code is completely different and instead of using a keybind to toggle the Step Up feature, we use Cloth Config configurations
Configuration
Config file is at config/stepitup.json5 in your Minecraft game folder. You can enable/disable the Step Up feature, and enable/disable it when sneaking (requires restarting game to take effect).
Recommended to use some sort of Mod Menu, then you should be able to configure it through that mod menu dynamically without restarting your game.
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Credits
All code by spoorn
CurseForge mod icon by DIMaalF