When you add a # in front of your search term (without spaces) on Vivaldi Social, it’ll search for posts with that hashtag. When you add an @, it will look for matching usernames. But there are many operators that you can additionally use to filter search results. See the full list below:

• has:media – Shows posts with attachments (images, audio, video).
• has:poll – Shows posts with a poll.
• has:embed – Shows posts with links that display embedded media (for example, YouTube or PeerTube)
• language:fr using language codes – Shows posts in the specified language.
• is:reply – Shows posts that are replies to other posts.
• is:sensitive – Shows posts that are marked as sensitive.
• from:user – Shows posts from the specified user.
• from:me – Shows your own posts.
• in:all – Shows results from posts that are visible to you.
• in:library – Shows posts you have made and/or interacted with.
• before:YYYY-MM-DD – Shows posts that were published before the specified date.
• during:YYYY-MM-DD – Shows posts that were published on the specified date.
• after:YYYY-MM-DD – Shows posts that were published after the specified date.