Hi MayaandBenji,
Welcome to the Apple Community.
Apple support have articles online (links below) that may help guide you.
Set paper size and orientation in Pages on iPad:
(NB: n a word-processing document,
you may need to tap the Document tab at the top of the screen to see the paper size controls.
https://support.apple.com/en-au/guide/pages-ipad/tan249e04269/11.1/ipados/1.0
Set paper size and orientation in Pages on iPhone:
https://support.apple.com/en-au/guide/pages-iphone/tan249e04269/ios
If your Samsung printer is AirPrint enabled:
Use AirPrint to print from your iPhone, iPad, or iPod touch
(NB. To find the print option, tap the app’s share icon — or — or tap
https://support.apple.com/en-us/HT201387
Or
View, share, and print photos on iPhone:
https://support.apple.com/en-au/guide/iphone/iph3d314a6f/ios
Print from iPad
https://support.apple.com/en-au/guide/ipad/ipad997d95cd/14.0/ipados/14.0
Hope something here proves useful to you :)