There's a lot of magnetic switches compatible for Wooting keyboards - just look into KS-20 compatible switches and there are now over a dozen of them. Check the full Wooting 60HE compatibility guide: https://www.hlplanet.com/wooting-compability-guide/

But the selection is silent switches is very very small. In 2024 there were almost no silent switches for Wooting, but now that's changed.

Glorious Gaming - Lynx Silent

Lynx HE silent - This switch was released for GMMK HE keyboards, but it works with Wooting.

Gamakay Magnetic Phoenix Switch

Gamakay Phoenix - This was released with Gamakay HE keyboard and wasn't available separately until recently. Very decent silent switch.

Gateron Genty

This was advertised as silent switch, but it is semi silent at best and in my opinion it's not even that.