Trump did "press conferences", aka rallies, for the sole purpose of selling his ideologies - if you could call them that, it feels wrong to attribute ideas to such an idiot - and/or brand and needed to do that constantly to keep his base motivated and on his side, whereas Biden will do a press conference when it's needed. He's probably done some but in the main it will be irrelevant to us over here. Actually most of Trump's were irrelevant over here too, but it was so damn interesting how he went about "governing".