Multiple product landing pages vs all-on-one page

My company resells several software vendors, most of which have multiple products - over 20 vendors and over 100 total products. As is the norm in software, there are frequent changes – new products, changes of product names and/or logos, etc., and, of course, the need to regularly refresh content to keep SERP happy.

I am a one-person marketing department, so time is precious, but everything from content creation to SWAG design falls to me. The more pages I have, the harder it is to keep content up-to-date and refreshed often, but I want the best SEO/search results possible.

With the recent changes in Google, AI, etc., how much is the gain in SEO if I have a landing page for every vendor AND a landing page for every product vs having the vendor/products on the same page?