I don’t quite get what you are asking. Students have always prepared intensely for these tests. Students have been using tutors and studying and practicing for dozens of hours for many years, perhaps decades. Some students mistakenly study too much, at the expense of other subjects. They are not doing that more often right now, at least IMO. The question of how meaningful scores are when students have access to tutors, etc…is constantly debated both here and by admissions committees.
If you are specifically referring to students testing now in pandemic conditions, my understanding is that it’s business as usual, except for wearing masks and fewer students per room. If there is a big difference, it’s that I believe many more students will eschew these tests as colleges continue to got test optional. Kids who are aiming high or who want merit aid will continue to take them, at least for the next few years I think.