[okennedy]

To their credit, US and EU funding agencies agree with you! Back at the start of 2016 or so, the NSF started adding clauses to grant contracts requiring that all research supported by new NSF awards be deposited in its open access repository: https://par.nsf.gov/ Results from there don't seem to show up in major search engines, neither academic (Google Scholar, DBLP), nor general (DDG, Google). Nevertheless, many ACM articles from the past 5 years can be found there. Similar repositories exist for other funding agencies.

Also worth noting: Many ACM publications will be cross-posted on ArXiV (https://arxiv.org) or faculty webpages. It's an open secret that many faculty will publish "preprint" versions of their articles there after the paper passes peer review, but before they sign any licensing agreement with a publisher.