Historically, Instagram doesn’t like people leaving the platform by clicking links, therefore there are so few places where you can put a clickable link on Instagram.
These are:
Instagram bio
Instagram stories
While links in stories only live for 24 hours and you have to create new stories again and again to keep those clicks coming, your link in bio is always there. It is the only way to generate some clicks and leads on Instagram without proactively creating new content.