Now I have no doubt the deal will close but even today's announcement I noticed the US is missing from the list of countries that approved the deal.
It does say that "There is no legal impediment to close the deal in the US"
But I found the following articles from FTC and I am not sure what to make out of them
https://www.ftc.gov/enforcement/competition-matters/2021/08/adjusting-merger-review-deal-surge-merger-filings
https://www.ftc.gov/system/files/attachments/blog_posts/Adjusting%20merger%20review%20to%20deal%20with%20the%20surge%20in%20merger%20filings/sample_pre-consummation_warning_letter.pdf
"However, the law permits the antitrust agencies to determine that a merger is illegal even after the companies have merged and even if the merger was subject to premerger review. When the FTC does not challenge a transaction prior to its consummation, this does not constitute an “approval” or “clearance” of the deal, and the agency maintains the right to challenge a deal regardless of whether it was initially investigated. The FTC always has the right to take such further action as the public interest may require."