At this time, Instagram has a sticker option for links for business pages with 10,000+ followers or verified through them (little blue checkmark by name). If you meet those criteria, Insta will allow you to include links in your stories. Otherwise, clickable links can only be added to your page's bio. Generally businesses and influencers will add a link to a landing page that allows for multiple redirect links (to other social platforms, stores, sign up forms, etc.) in their bio.
If you have additional questions on this functionality, I'd advise reaching out to Instagram's support.
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