Second picture just looks like damage to the heat shielding so I wouldn't worry about that.
The first picture though is a "flexi joint", ...these can start to blow and when they do will either mean you'll need a new Y-pipe or will have to have the flexi joint repaired by having it cut out & a new one welded in place.
At the moment though it doesn't look like it is blowing as I can't see any soot build up deposits although it might not be too long before it does start blowing as that is obviously a weak spot now. Just keep an eye on it for now would be my advice.