You’re right — Instagram still doesn’t allow clickable links directly in post captions, even for business profiles. The main place where links work is the bio section, or through features like Stories (with link stickers) and tools like link-in-bio pages.
If you’re trying to make your profile look cleaner and more organized, especially when adding spacing or formatting in your bio, tools like espaço invisível can help create invisible spaces so your bio layout looks more structured and easier to read. It’s a small tweak, but it can improve how your link and content are presented to visitors.