The graph you posted is affected by the end of mandatory testing, which is why you now need survey results. Mandatory testing acted as a sort of very poorly controlled "survey" because people couldn't opt out, but now testing is done almost entirely at home using LFTs without results being reported, you need a recruitment survey approach.

In the UK there was a decline after March 2022 but now, as I said, it is heading back up again and has nearly reached the same peak as previously:

https://health-study.joinzoe.com/data#levels-over-time

2022 is showing much higher peaks than other years when you use data sources not affected by the collapse in testing levels.

"vaccinated vs unvaccinated hospitalization and death rates, you'll find a significant pattern there."

I think in many countries the hospitalization rate for vaccinated/unvaccinated now matches the underlying proportions, i.e. no effect on hospitalizations or deaths any longer (and possibly never, due to how the data was being distorted by various factors previously, but that's a harder case to prove due to government data secrecy).