Parallels Desktop 19 brings a limited support of multitouch gestures in guest macOS machines on Apple Silicon Macs. Presently, two-finger gestures are supported, e.g., scrolling vertically and horizontally, zooming in and out by pinching, and rotating.
Note: This feature requires the host Mac to run macOS 13 or newer as the primary OS.
Three- or four-finger gestures still control the primary macOS and not the guest one.