Bitwig Studio has customisable remote controls for devices and plugins which are rather like NKS mappings but with several advantages. For a start the editor for creating them is much more flexible than Komplete Kontrol's NKS editor as you can freely move around pages and also map the same param to multiple pages (eg if you want to create a Perform panel at the front). Also remote control mappings can be per preset or per device ('device panels'), and as you can use the Bitwig browser to browse presets for many plugin formats, including all u-he plugins and most CLAP format plugins (which have built-in preset discovery), this means not having to save potentially hundreds of patches as NKS. The system works equally well with Bitwig native devices (which are pre mapped) and plugins and supports any plugin format Bitwig supports, not just VST/VST3 but also CLAP.
So with this in mind I setup an online repository for Bitwig Device panels and got a thread going on the KvR forum to encourage other users to contribute - some have gone on to create dozens themselves and setup their own repositories to share them, so we have covered between us a lot of plugins by now (I think probably a lot more than are NKS compatible and this works particularly well well for FX, which KK/NKS really doesn't)
All remote controls made by myself and drsyncestein are now migrated to our Github repository which I hope other people will also contribute to in time to make a single place for remote controls for as many plugins as we can make them for
https://github.com/SWey60/BitwigRemotes
Instructions on how to import these into Bitwig are also in the KvR thread (post 1)
NOTE - Keyboard control of devices
EDIT 13/8/25 if you are on a MkIII the new firmware 2 extended functionality enables direct control of device and plugin params from the keyboard - which makes these even more essential. There is also an extension by MOSS extension which adds more functionality.