I think it's not yet quite popular on some bookies from this forum I tried to look each one of them and most of they offer is just Counter Strike. or maybe I just missed it if someone knows any bookie that comes from forum please share it here
In addition to what Lanatsa suggested nitrogensports are also offering lines for Valorant now that they're using the same odds provider ultraplay which focuses more on esports compared to the popular bookies like stake and sportsbet that uses sportsradar.
If they can bring something that can hype their game to get the attention of the gamers then the gamblers will surely to follow as many casino owners will surely to add the game if it is getting popular as days passes by. I've seen an agent feature in their site but I wonder if how it will create an impact to the players.
It's already popular but on the competitive side of things not so much since there's no seasonal league or tournaments unlike dota, csgo and league.