When might CloudFront support the HTTP QUERY method?

There doesn't seem to be enough here to put a date on it. RFC 10008 is at the Proposed Standard stage, and broader support across servers and clients could still take years. CloudFront might wait until the method is more widely adopted, but that's speculation, not a known roadmap.

Browser and CDN implementations could be useful early signals to watch. They wouldn't guarantee a CloudFront timeline, though.

I wouldn't assume the standards label alone tells us when support will arrive. The source discussion raises a separate question about whether clients can already send QUERY as a custom method, but that wouldn't establish that CloudFront accepts or handles it.