Parking stands not available on Navigraph charts for EGSS

[theoldtannery]

Have just done a flight from EGHI to EGSS using BeyondATC. All went well but when I landed I was allocated a parking ramp of 601. This does not exist on any charts from Lido or Navigraph. Initially I thought BATC was probably at fault but then I returned to the world map and zoomed in to the airport and sure enough that stand is shown as available which is why BATC was able to choose it. I have also seen this on another airport from a different supplier. Can anyone confirm whether the stand is right as shown in MSFS 2024 and that the charts are out of date for things like parking stands or if EGSS is wrong in showing them.