I don't think with Leicester City and Chelsea are difficult team for Newcastle United on two matches left for qualifying to Champion League spot standing season 2023/24. You can see both teams performance on last several matches not consistent and they looks loss motivate for winning on every game exactly with Chelsea.
Of we are considering how their performance sobfar during this season, I also believe that Newcastle will win when against both Leicester and Chelsea. But it will be tough game against Chelsea, because althoigh they are very weak this season, sometimes, they can perform greatly and make their opponent difficult to move and win. So, whatever the condition, Newcaste maut not underestimate the game when against Chelsea later in order to stay i the top 3.