We are attending DAH at MK on 2/10. I was originally only able to squeeze in 2 FP between 7pm and DHS, but now that park hours have been extended to 9, I would like to try to add one more in there. Just checked this evening, and the lastest FP for that day are still @ 7:30☹️
Usually around 12-48 hours afterwards. It has been known to happen after just a couple of hours though.
Once you get the email from TP, you can start checking for FPs.