"Notify me of new comments via email" not displayed when Jetpack Comments is enabled.

### Impacted plugin

Jetpack

### Quick summary

When Jetpack Comments is enabled, the option for "Notify me of new comments via email" is not displayed on the comment form.

### Steps to reproduce

1. Enable Jetpack Subscriptions and the "Subscribe to Comments" option:

2. Make sure Jetpack Comments is deactivated.
3. View a post and see the Subscribe to comments option in the comment form:

4. Now enable Jetpack Comments.
5. Reload the same post.

### A clear and concise description of what you expected to happen.

The **Notify me of new comments via email** option should still be visible.

### What actually happened

It is not displayed:

### Impact

Some (< 50%)

### Available workarounds?

No but the platform is still usable

### Platform (Simple and/or Atomic)

Self-hosted

### Logs or notes

_No response_

No files or tests are named. Reproduce the issue with Jetpack Subscriptions, Subscribe to Comments, and Jetpack Comments enabled, then trace how the comment form renders the notification option and how those integrations interact. Done means the “Notify me of new comments via email” option is visible in the Jetpack Comments form and remains functional.

Written by the indexing model from the issue text.