Does anyone know which version of the Pilot DVD this is? *READ DESCRIPTION FOR MORE DETAILS*

I ordered a "used" Region 1 Complete Season 1 set off of Amazon as I live in the UK but I have a Region-Free DVD Player. The DVD came with "Season 1 Disc 2" and some version of the Pilot DVD instead of "Season 1 Disc 1". The DVD seems to have no region code on the Disc label, and I obviously have no case for it so I don't know what it says on the case. It works perfectly fine on an British Xbox Series X that only plays Region 2 DVDs. The fact that there is no coding on the disc makes me think...