maths Edexcel a level- stats

is student t distribution still used in statistics?if so when?

Further maths I believe so page 32, section 7 in
https://qualifications.pearson.com/content/dam/pdf/A%20Level/Mathematics/2017/specification-and-sample-assesment/a-level-l3-further-mathematics-specification.pdf
Simple example of when its used is when you are doing sample mean and normal distributions but the variance is unknown
https://pmt.physicsandmathstutor.com/download/Maths/A-level/Further/Statistics/Edexcel/FS2/Cheat-Sheets/Ch.7%20Confidence%20Intervals%20and%20Tests%20using%20t-Distribution.pdf

As it was derived from quality assuring guinness, it should be central to the syllabus
https://en.wikipedia.org/wiki/Student%27s_t-distribution