You can use our Convert Images to PDF automation for this. It will take files from the Input Field (Images) and merge any image files in that field into one PDF file per record in the Output Field (PDF) field. If multiple images are present for the same record, each image will be converted to one page in the resulting PDF. You can also choose the Page Orientation between Portrait and Landscape.
Set up the automation
Create the Convert Images to PDF automation, then select your Airtable base and table.
In Airtable, put the images for each document in an attachment field on the same record. Add a different attachment field for the PDF.
Choose the source under Input Field (Images) and the destination under Output Field (PDF).
Set Page Orientation to Portrait or Landscape.
Limit the run to a view containing one or two sample records, then run the automation. Open the PDF and check that all expected images are included, with one image per page. Images that cannot be processed may be skipped, so checking the result is important.
Before processing more records, review the existing-data handling setting, especially if your output field already contains files.