Airtable comes with a built-in Page Designer extension, but it has 2 major limitations:
(1) It can only create documents that are one-page long, and
(2) It can't be automated in any way.
So most people are required to use an external document creation app that can automatically create PDF files from Airtable data.
Each one of the document creation tools handles images from attachment fields in a slightly different way, but they can all handle an unlimited number of attachments, and they can all be fully automated.
Here are a few options:
1. One of the most popular PDF creation tools for Airtable is DocuMint. This can be automated natively or by using Make’s DocuMint automations. Here's a video from Documint on how to send several attachments from Airtable into a PDF file.
2. Another popular tool is Docs Automator, which integrates with Google Docs.
3. However, you can choose ANY document creation app that you would like, and automate the PDF creation process by using Make.
Most people choose to use Google Slides for these purposes, but you can use good old fashioned Google Docs, Microsoft Word, or even newer apps like Formstack Documents or PDF Monkey.
(Make supports over 1,600 apps natively and it also supports all other apps that have a REST API with its HTTP module, so you can really choose any app that you would like.)
Your biggest challenge will be learning how to use Make, because it has a bit of a learning curve. To help people learn it, I created this basic navigation video. I also provide the links to a few other Make training resources there as well.
p.s. If you have a budget for your project and you’d like to hire an expert Airtable consultant to help you with any of this, please feel free to contact me through my website: Airtable consulting — ScottWorld