Recently Huawei has shared this formula for TBF drop:
downlink：
(A9118+A9318)/(L9545+L9549+L9550+L9551+L9552+L9546+L9547+L9548）
uplink：
(A9006+A9007+A9206+A9207)/ (L9441+L9445+L9446+L9447+L9448+L9442+L9443+L9444)
is this OK for use. To me it looks OK.