Tekken itself is not an Esport with a lot of money behind it. It is more of a close-knit community of fans that make it one of the most exciting and popular Esports. But it is not picked up by most sportsbooks to make it a very lucrative option. Finding matches to bet on would be difficult and most sportsbooks only offer the most basic wagers.
The game sees a higher interest in betting during tournament seasons, but the rest of the year, there is not that much. If you’re looking to bet around the year, it’d be better to diversify rather than just focussing on Tekken.