A lot of people are reviewing with LLMs, despite it being banned. I don't entirely blame people nowadays... the person inclined to review using LLMs without double checking everything is probably someone who would have given a generic terrible review anyway.
A lot of conferences now require that one or even all authors who submit to the conference review for it, but they may be very unqualified. I've been told that I must review for conferences where some collaborators are submitting a paper and I helped, but I really don't know much about the field. I also have to be pretty picky with the venues I review for nowadays, just because my time is way too limited.
Conference reviewing has always been rife with problems, where the majority of reviewers wait until the last day which means they aren't going to do a very good job evaluating 5-10 papers.