Footer Credit: Paragraph Block tied to Footer Credit should be locked

[hacchism]

Quick summary

With FSE theme, you can edit the Paragraph Block tied to Footer Credit. However, the change never gets reflected to a live site. This confuses users.

We should lock the Paragraph Block so it's clear that the block shouldn't be edited. And ideally, we can show a prompt to head to Customize > Site Identity > Footer Credit to change the footer credit option.

Steps to reproduce

1. Create a simple site.
2. Switch to any FSE theme (i.e. Livro that I tested with)
3. Go to Appearance → Editor → Patterns → Footer
4. Find the existing Paragraph Block that is tied to Footer Credit and add any text into it and save the change

What you expected to happen

A normal user would expect the change to be reflected on their live site.

What actually happened

No change. Only the Footer Credit selected in Customize > Site Identity > Footer Credit shows up.

Impact

Some (< 50%)

Available workarounds?

Yes, easy to implement

Platform (Simple and/or Atomic)

No response

Logs or notes

No response

[cuemarie]

📌 REPRODUCTION RESULTS

• Tested on Simple – Replicated

📌 FINDINGS/SCREENSHOTS/VIDEO
AFAIK, it's by design that the footer credit set in the customizer overrides the block one, but this definitely results in a confusing experience for users who have full ability to edit the footer credit in the Site Editor.

QpMeWK.mp4

• Related: FSE Beta: Footer credit looks different in the editor vs front-end of the site #59363

📌 ACTIONS

• We've never had the Footer credit block locked from edits, since the Customizer overrides it, so I've changed this to a Feature Request type instead.
• Feature Request kept

[cuemarie]

Did a little further research into the Footer Credit on Templates - looks like there was work being put into a better solution that was ultimately put on hold, here: https://github.com/Automattic/view-design/issues/244

[mmtr]

This shouldn't be needed as of D156044-code (Simple sites) and Automattic/jetpack#38458 (Atomic sites).