Most people solve this outside of email using project management software.

We use ClickUp and absolutely love it. You can turn any email, Slack message, form submission, Jira event -- anything -- into a task in ClickUp. It includes due dates, comments, file attachments, docs, and more.

The only other company that makes me feel like a fanboy is Jetbrains. ClickUp is really that good (even though it's pretty massive and intimidating to start out with).