No, it mostly stopped due to carriers not wanting FM due to it being competing with traffic bills - this despite pressure from civil society; think emergency responders, not wanting to drop the functionality for obvious reasons.
That doesn't explain its absence from most phones from manufacturers that do not have any chance on getting sold directly by carriers. You will find occasional features on those phones - such as multiple SIM slots - that are rare on phones sold directly by carriers, but FM radio has become rare even on those.
On phones sold directly from carriers? Where? Not doubting that it's possible, but I've not seen that anywhere I've looked.
I know it is common outside of what carriers sell - every phone I've owned for the last decade have had multiple SIM slots. But none of the phones offered by my carrier does, at least last I checked.
In any case, the point is that even on phones by manufacturers that have no reason to care what the carriers think - and none of the phones I've had in recent years have been carried by any carriers as far as I can tell -, FM radio is no longer a common feature, and so pressure from carriers is not a good explanation.
I don't know about current models, but in the past a trace was cut and a resistor placed in order to _disable_ FM.
Multiple SIM support is also simply sabotaged due to carrier pressure and a price to pay per registered IMEI.
