An embed says “unavailable” or shows a login wall

Why some social embeds fail, and what actually works.

Embeds are served by the platform itself, and each platform has rules:

• Instagram / Facebook — only *public* posts embed, and the platform decides per post. Private, restricted or some older posts show “unavailable”. Try another post; profile links always work as a button.
• LinkedIn — only individual posts embed (URLs containing an activity ID). Profile and company pages become a button.
• Strava — the activity must be public (check your Strava privacy settings).
• Duolingo / Medium / Etsy / Shopify — the account, shop or profile must be public.