Go to a folder with the images you want to combine. Select the three dots in the top right corner and tap "Select". Then select the pictures you wish to merge.
Then click the three dots in the bottom right corner and select "Create PDF".
Go to a folder with the images you want to combine. Select the three dots in the top right corner and tap "Select". Then select the pictures you wish to merge.
Then click the three dots in the bottom right corner and select "Create PDF".
Sometimes a pdf is too large to mail.
How to scan, edit, sign, and manage PDFs directly on your iPhone using the Files app