If your Tinyhawk 3 Plus ELRS BNF drone does not appear to bind with your ELRS radio and/or module, the most common cause of this is incompatible packet rates for the ELRS SPI receiver on the Tinyhawk 3 Plus series.
SPI ELRS receivers DO NOT support D(D250, D500), F(F500, F1000) and Full Res(100Hz Full Res, 333Hz Full Res) Modes (Packet Rates) and thus will not bind or sync with a TX module in any of these modes.