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You can add a dependabot.yml config to regulate when Dependabot runs and how many PRs it will open at a time:

https://docs.github.com/en/code-security/reference/supply-ch...

The refined github extension[0] has some defaults that make the default view a little more tolerable. Past that I can personally recommend Renovate, which supports far more ecosystems and customisation options (like auto merging).

[0]: https://github.com/refined-github/refined-github

Isn't it?

You can have Dependabot enabled, but turn off automatic PRs. You can then manually generate a PR for an auto-fixable issue if you want, or just do the fixes yourself and watch the issue number shrink.