From a 2018 Outline Business Case, the 2025 Annual Demand for Option T2 (2tph Serving all 6 stations) was 564,000. Now not all the stations are open, and 250,000 in 5 months will still beat that, but it's not 5 times is it? I don't know the source of the 50,000 number, would be interesting to know.
(would post a screenshot but for some reason can't paste images in to the box at the moment).
https://gat04-live-1517c8a4486c4160...p40_-_outline_business_case_november_2019.pdf (page 97 of the file, Table 4-2).
I do find it funny that when bad reporting is critical of the railway it is taken apart on these forums, yet positive reporting is accepted without questions.