Hi gang, been struggling with this issue for days!
In my app I'm making requests to:
const res = await fetch(${process.env.NEXT_PUBLIC_BASE_URL}/api/get-public-posts?category=${category}&subcategory=${subcategory}&region=${region}&search=${search}&page=${page}&pageSize=${pageSize}, {
next: {tags: ['public-posts'] }
});

I added some headers in the api route so that vercel picks up the requests and uses the Edge cache, which seems to work:
return new Response(JSON.stringify({ ads, total }), {
status: 200,
headers: {
'Cache-Control': 'public, s-maxage=10800, stale-while-revalidate=59', // 1 day cache
'Content-Type': 'application/json',
},
});

Now I can see that the requests hit the cache, in the vercel interface.

Now, my issue is that I need to revalidate the cache whenever a new post is added.
In a server component I'm running:
revalidateTag('public-posts');

But this doesn't seem to work. Any insights would be much appreciated!