Is your Samsung Cloud still backing up photo's @deeva as this was due to end and then changed to OneDrive.
So typically a person would add their OneDrive and or Samsung Account to their phone and then when initially setting up the phone choose to use a back up instead of setting up as a new phone.
Current Phone > Samsung Z Fold³ 5G.
@deeva: If you still have access to the Galaxy S8 then you might want to try transferring your photos via Smart Switch. To find out more, please follow the link below.