The forum auto-merges multiple posts in quick succession to avoid clutter, so that might be what's causing the issue.
Have you tried refreshing the page? That could possibly solve your problem as the Edit button shows up fine on my end when I view your post.
This is a quick double-reply to test if the same issue happens to me.
Edit: I did get an error when I tried to post the double-reply, so clearly there is something wrong with it. 🤔
But the Edit button seems to work fine after refreshing the page. 🤷♂️