voice over and nvda is not able to read title of the amp-iframe

### Description

screen reader should read the title ("Business iFrame") of iframe when focus was on the amp-iframe.
but in the example screen reader is not able to read the title of amp - iframe.

title is mentioned in the amp-iframe

here is the link
https://s3-componentsexperiments-sbx01-cac1-01.s3.ca-central-1.amazonaws.com/AMP/QA+Links/jan-24-amp-issue.html

### Reproduction Steps

1) click on the above link
2)press tab to get focus on the iframe

### Relevant Logs

_No response_

### Browser(s) Affected

Chrome, Safari

### OS(s) Affected

_No response_

### Device(s) Affected

_No response_

### AMP Version Affected

_No response_

Start with the provided reproduction URL and inspect the amp-iframe behavior when focus moves to it in Chrome and Safari with VoiceOver and NVDA. Done means the screen reader announces the iframe title, "Business iFrame," when the iframe receives focus.

Written by the indexing model from the issue text.