Venus Optics offers several lenses for Leica M-mount but many readers do not know that all Laowa lenses except the 12-24mm f/5.6 zoom are rangefinder-coupled and can be used on a rangefinder - see the product listing at B&H and on the official Venus Optics website:
New: Venus Optics Laowa 15mm f/2 Zero-D LM lens for Leica M-mount