Calculate gNodeB transmit power on PDSCH channels in 5G

Dear experts,

I am seeking your help here as I would like to calculate the exact power (or a good approximation) that the gNodeB radiates towards UE on a Downlink speed test in a drivetest scenario.

from UE, I know the SS-PBCH Block Power, Block Power offset, the total RBs used and MIMO layers but I am struggling to find the right formula to use. I would appreciate any help you could provide.

THank you very much!!