Other people have asked for the ability to apply LFOs (including S&H) to parameters in other blocks. In your case, you are asking for an LFO or S&H to be applied to the cutoff frequency in a filter. But why stop there? Phaser and flanger sweeps, delay time and feedback, distortion pedal gain, etc., could all benefit from a universal approach to LFOs.
This assignable/programmable ability is one of my favorite features of the Empress Zoia, which I still keep on my pedalboard next to my QC.
Give these requests a look. I would also like to see this kind of functionality built into CorOS: