That is 100% out of CB’s control, and again nothing CB can do once it’s close to the test date.
I am not a fan of CB at all, but people should understand how testing works operationally, and who has the control.
Having worked at a HS which offered tests, I can assure you it would be nearly impossible to add capacity close to the test date. Running these tests is a huge PITA for HS staff which is why some have completely stopped running tests. Further, Many sites cut back on capacity during covid, and have never increased again, partially do to staffing issues.