1. No, and there is no NTA even if it gets denied. You can leave the United States within a short period. After the denial you won't get an NTA.
2. You don't have to do that. There is no question of unlawful presence or being out of status when timely filed extension amendment or transfer request is pending and if you choose to leave the USA for whatever reasons you can always get a visa and come back. Traveling outside the USA does not abandon your H-1request. More...
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