With the currently high sunspot numbers there is a chance of F2 openings on 6m. I shall try again for the USA after lunch. Apparently it was open to Australia but I spotted nothing on my omni vertical yesterday!
UPDATE 1610z: No sign here today of F2 activity on 6m. I shall stick with it as today has been exceptional on 10m WSPR. I have spotted one station on 6m FT8 in the USA this autumn. I suspect now is too late.