Upon further checking it appears they are not regulated and have no license. I urge anyone to strongly think twice before thinking about playing here.
How did you check? Because in their website they claimed they have are a registered casino.
Welcome to Betflexi.com Casino Platform, operated by Palness Media BV. With the registration No. A227489 - CCA CR-NG! These Terms of Use ("Terms") govern your access to and use of our website, mobile application, and other online products and services (collectively, the "Services"). By accessing or using the Services, you agree to be bound by these Terms of Use and our Privacy Policy.
https://betflexi.com/pages/terms-of-useThis isn't a license to operate/be regulated for gambling and I urge you to try actually find that registration. There's no mention of jurisdiction but I have to assume they meant B.V so it's Costa Rica so they got their own registration wrong in their ToS.