I think GT7 has broken my controller
Installed it today for the first time, almost immediately both L2 and R2 started making an almighty rattle under heavy braking/acceleration, and I think the adaptive trigger on R2 has now given up entirely, as it's feeling noticeably lighter than L2!
This is actually very common, I had exactly the same problem when playing returnal. I noticed that the R2 felt loose. I contacted Sony via their customer support and they told me to send it to them to be repaired. I'm the end they have me a new replacement controller.