Skilled Worker Visa Application Passport Upload: Just the Photo Page or the Entire Passport?

Hi,

I am going to attend my biometric appointment for SWV tomorrow and I will submit my supporting documents prior to that. UKVI told me the mandatory document I have to submit is 'The passport issued by [My Country]'. Is the photo page of my passport enough or I need to submit the scanned copy of the full passport containing all pages?

Thanks!