What is the best way to manage dependency update pull requests?

Development teams that are working on multi-repo systems and have a bot for dependency updates, usually face the problem of an accumulation of a lot of dependency update pull requests . It feels like a full-time job to review, approve and merge dependency updates in the master and doing it for many repos. Especially, when there are tens of dependency update PRs every day.

One solution is that each person in the team should give 15-30 minutes every day to merge those PRs. But seems like it's not very viable. I want to hear creative solutions to tackle this problem.