Are babies left alone to play by themselves at infant care

Is it normal for babies to be left alone to play by themselves at infant care ? Ive always thought the teachers will play or talk to them but i picked up my 2 months old and he was placed at a corner on a mat, with toys at the side(which he dont look interested in) and my heart sank to the very most bottom. He must’ve felt lonely. I know sometimes baby needs to play independently what if he’s always playing alone the whole day 😣 and he’s the youngest in the centre