No. RN delegation is not required if a student self-test using a CLIA-waived COVID-19 test in public and private schools, K-12 grades. The RN can direct school staff to instruct the student to do the self-test following the COVID-19 test kit instructions, including observing the student doing a self-test, and reporting the results to the school RN. The school or school district should have policies and procedures for students to perform self-testing.
COVID-19 Self-Testing Guidance for Establishments (wa.gov)
Medical Test Sites (MTS) | Washington State Department of Health
RN Authority with COVID-19 CLIA-Waived Tests in School Settings | WABON
Testing in Schools Frequently Asked Questions | Washington State Department of Health
Point of Care Testing Guidelines (wa.gov)
RCW 74.39.050: Individuals with functional disabilities—Self-directed care. (wa.gov)