As I recall, I missed the first day completely once and was able to make final progression on my final grind, so I don’t think all hope is lost. The last two days, in particular, have a lot of points, so if you can grind them you can make up for lost ground.
If you have Daredevil, it should be easier as the above accomplishment was long before the 5* node was introduced.
The 5* node doesn’t calculate in how d3 figures prog so that’s a lot of extra points on the table to help make it up, Doing full 7x should get you there with no problem as most events doing optimal will get you to prog 1-2 subs before end.
If you have the 5*, you should easily be able to do it. Without taking the 5e node into account at all, the last 3 days have 100k points if played optimally. And the next day has 27k points if played optimally. The final progression is just 111k. It should be easily doable if you join now, with sub-optimal play, and maybe even without DD