All u-he plugins that support NKS have NKS export built in.
First you need to give the patches a bankname in the plugin’s own browser by selecting them all and dragging them into the Bank list and filling out the bank name when prompted to (this ensures they won’t get mixed up with the other plugin factory NKS when you import them into KK)
Then right click on the save button in the plugin browser and switch the save as format to nksf.
Then select the whole bank and right click on the selected patches and choose export to nksf
Finally update the Komplete Kontrol database for the plugin in KK settings
Many u-he expansions already have NKS versions but most third party ones won’t