Is it possible to use the share sheet on my website for IOS and Mac devices?
And if it´s possible then how?
Yes, it is possible using Web Share API.
Check here for more detail: https://developer.mozilla.org/en-US/docs/Web/API/Navigator/share
Example: https://mdn.github.io/dom-examples/web-share/
Source code of example: https://github.com/mdn/dom-examples/blob/master/web-share/index.html