It does but I have seen normal tempered stick on type glass screen protectors on Amazon for the S21's and some I have seen say they are not compatible with the S21 fingerprint scanner. There is not a lot of information I have found on it but because of the stuff I have sceen on amazon I am assuming we will still need a UV liquid gel glue on type.

e.g.
https://www.amazon.com/dp/B08RYWWN5M/ref=cm_sw_r_sm_apa_fabc_.mqbGb99A36XR

But I hope I am wrong........

https://www.amazon.com/dp/B08RYWWN5M/ref=cm_sw_r_cp_apa_fabc_TMGA5E4WE68YW6HSQG9B

it says that it's not compatible, but I've had no issues after registering once applied and turning on the extra sensitive touch

can't beat 8.99 for 2