Good luck actually unsubscribing from LinkedIn emails. The dark pattern they employ (or at least used to employ, for many many years) is to just periodically add new "categories" of email to send you, that you haven't yet unsubscribed from. Back in ~2015, out of frustration I changed my LinkedIn email to a throwaway
This would be illegal in the EU + UK, and certainly doesn't work like that in the UK. Potentially LinkedIn only made that change based on jurisdiction so maybe you two live in different places?