My DS got a first class chemistry BSc from a Russell group uni in 2020. (I hesitate to say graduated, as he hasn’t yet 🤣🤣)
He did do a placement year, but in a non-chemistry industry that he is keen to work in long term.
None of his chemistry applications were successful, similar with most of his course friends.
As a pp said, it is so competitive getting placements, not enough to go around for too many students.
I think less than 5 on his course (of 160+) ended up doing a placement year, even though many wanted to.
At open days, they push the placement year as an incentive, but unless the dept has specific contacts with industry, the students are usually left to apply independently, in competition with students from other unis.
I was quite shocked at this when he started 2nd yr, having sat in presentations at open days where placement/working abroad was made a selling point.
This is something that he should ask about at open days this year - how much help is given.
I should add though - although his placement industry was badly affected by COVID, he has got a graduate role in a similar industry, working for managers who had previously worked at his placement company. So the placement definitely helped him secure his graduate role.