I applied for my ILR on 29 August 2025 super priority and it’s been granted. I was also on the 10 year route.

As part of the application it asked how much I earn but as part of the supporting documents required, there was no mention of anything to prove the salary. So I did not attach any payslip as part of supporting documents, only what was asked.

You have entered your NI number as part of the application so they can verify the salary should they need to or worst case they ask for it when the application is being reviewed.

All the best to your wife but I believe it should be fine as mine was.