Some people use the access and skills of uni well and others less so. Internships, work experience, placement years, even study abroads are all good things to do across uni, and people need to be applying for jobs in the summer between 2nd year and 3rd year, and then in 3rd year. That way they actually have a job ready when they graduate to start like August or September, otherwise that sort of puts the out for a year and they rejoin application season.
He needs to go to events like BrightNetwork (they do loads across many industries) there are ones specific to each industry as well. Others like events helping with applications, assesment centers, interviews, those help you to be able to stand out etc. Look on LinkedIn properly, also sities like Youth Opportunities, there are others but specific to industries.
Also universities let graduates have access to their career portal, they have a bunch of graduate jobs on the portal, so you can look at them. Also as a graduate you can still book appointments with the careers team, to go through your CV, pratice assesment center exercises, pratice interviews etc. He will also still have access to the events/webinar they do, both virtual and in-person so ones on interview tips, internships (again they'll show many winter/spring/summer ones on the portal), they'll do networking events, and he can still attend career fairs or company talks.
There are resources out there, there are plenty, he has to utilise them and want to learn from them, otherwise with the level of competition he won't get those roles. Let him know about using his university career portal, making an account on BrightNetwork, Zero Gravity is another great platform for Y12+, university students can get a career mentor on their for free, they also do virtual events with companies, so HSBC giving tips for their internship or all the grad roles, events on assesment centers, specific jobs and application tips, they also do in-person events - the more you use the site, the more they invite you to better ones specific to the things you tell them. He needs to use these resources.
What is his degree on? What job/career/industry does he want to work in?