I even remember last year beta testing for the S10, we got the official Android 10 late..... I mean the beta testers got it days later after it was oficially available to anybody in the US
depends on when and where you enrolled in the beta program. for some users it might be 3rd beta for others 4th, etc. checkout the software version and you will see it's a newer variant than the one "we got as beta 3 (ztjq)"