Motorola omitted a magnetometer in some of their models. This was especially heinous as the "compass needle" can be emulated to some degree by fusion if gps and rotation/acceleration sensors, so the user wouldn't immediately notice the total lack of a compass. Since then I am always wary of what seemingly essential part of a phone they will omit this time...

Direction pointing seems to be pretty bad in any built up area (on my iPhone and my wife’s Pixel). I suspect that they are relying on accurate GPS for it combined with the magnetic compass. Both of which are a bit hit and miss when you are surrounded by tall steel framed buildings.