A DC-Return Plus a Bias-Tee can't be integrated to exactly the same output concurrently. Nonetheless, if a Bias-Tee is presently there it may be transformed being a DC-Return, just by connecting the bias tee pin to floor via a 47 Ohm resistor (as the internal impedance of your DC route https://rf.vllis.com/en/product-category/broadband-amplifiers