Look at the alternatives to Adobe listed in The best alternatives to Adobe InDesign for iOS and Mac. Affinity Publisher is listed, but there are alternatives that might be suitable. I have no experience with any of them.

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365