I'm very simple, make a fun frame v2 with a share button and I will use it and hit share on Farcaster

Developer ecosystem @farcaster, co-founder @bountycaster. Previously: co-founder of Scalar Capital, product at Coinbase, co-producer @ethereumfilm

is it possible for a share button to link to a deep link within a frame?

Sure. Your frame embed defines the specific URL that it opens. So:

1) Click the "share" button in your frame
2) Add the frame embed to a new cast
3) Use the page you want to open as that embed's button.action.url

(art + code)  /swatches | /charts-by-jvmi | www.jvmi.art

Sure. Your frame embed defines the specific URL that it opens. So:

1) Click the "share" button in your frame
2) Add the frame embed to a new cast
3) Use the page you want to open as that embed's button.action.url

https://docs.farcaster.xyz/developers/frames/v2/spec#frame-embed-metatags