Welcome to TST. It would really help to see your swing. You can post a video in the ‘Members Swings’ thread and get some great advice. Why your trail foot is lifting is most likely a result of some other mechanic you’re doing and that needs to be diagnosed before doing any drills.
There are many YouTube videos that show ‘early extension’ drills. Maybe you could watch some and see if one represents what you’re doing wrong. Cheers.
A number of us can, @billchao did it in the round and had like 25 feet for eagle.
Plus it was 265 to the center of the green, which means it was only like 250-255 to the front edge.
I wasn't hitting my driver great that day but a well struck drive for me can carry that, especially since it was a bit downhill.
Driver still isn't the play even though on a normal driving day I'm long enough to carry it.