Advice on grading assignments and exams during Covid Pandemic
This is not a policy for a TA to change. The faculty is responsible for the course evaluation policy. TAs just help carry it out. This is especially true if there are many TAs since grading needs to be consistent over all the students in a course.
If you think a change is warranted, discuss it with faculty. But you certainly can do so.
But, the basis of this question is unfortunately too focused on grading rather than learning. It is learning that has become more difficult. It is also true that the methods we use to evaluate students (exams, say) has been affected and cheating has been made easier and harder to catch. If you want to make a positive change, focus on those things.
Personally I think standards of learning should not be lowered. But better ways to construct courses and evaluate students are required now.
Note that employers also are going through the same things that students are, so it is unlikely that they will ignore the difficulties that students face in hiring and in graduate school admissions.