Hi @ArunJRK - the first issue you mention about Cannot read properties of undefined (reading 'data') was a bug that our engineering team fixed this week. It sounds like you're no longer running into that I'm hoping you haven't run into that over the past couple days, since the team merged the fix 
Thank you for flagging it here!
As for the formatting options available when exporting PDFs in Retool, here's a blog post by one of our customers that goes through various options that can be used. It explains things much better and more thoroughly than I could share here!
If you do find that there's more functionality you'd like for your use case, would you mind posting it as a feature request so that other users who are interested can chime in, and so it's tracked in the feature requests section of the forum? Thanks again for letting us know ways that Retool can be even more useful for your use case.