The difficulty level of playfield vs cabinet is much higher. Personally — having now created complete stencils for two playfields — I don’t think there would be enough interest. Maybe on higher volume titles where the artwork remains simple enough?
I make my files available for free to anyone dedicated enough to use them!
For cabinet stencils I recreate the artwork and laser cut them on 1/8th” hardboard. Gives a more authentic look than a vinyl stencil.
But yes you can achieve a lot with stencils:
https://pinside.com/pinball/forum/topic/silhouette-cameo-pinball-restorers-club/page/13#post-6997156
https://pinside.com/pinball/forum/topic/bare-wood-em-playfield-repaint#post-5935113