If you’re just glancing, then sure… and maybe if it’s only glancing-level important then that’s fine.

In my experience there are almost always some issues (either legit or misguided support requests,) PRs for docs and features, updates to libraries for vulnerabilities or deprecated code. Worth looking at stuff that isn’t open also. Even if it’s a 10 year old project and the last commit is from 6 months ago fixing a seemingly minor bug, if there more than a few stars or forks, and there aren’t ignored issues and PRs sitting there, I’d consider it trustworthy.

And if it does look abandoned but was active at some point, it’s always a good idea to take a stroll through the forks.