Pregnancy is not an "injury," and certainly not a job-related injury.
She was unable to perform the required tasks of her employment and her employer responded appropriately. In requesting "light duty" she acknowledged her inability to function as required.
Since Democrat congresspeople are generally people who have never actually been gainfully employed, they don't understand that employers do not have an infinitely-flexible storehouse of EMPTY positions that can be filled any time an employee happens to require something less strenuous. Had she been injured on the job, UPS would have found something for her, or paid her to sit at home.
In today's world, with an almost infinite cornucopia of birth-control means available - not to mention first term abortions, one does not "find oneself" pregnant. It is a voluntary act. She knew when she became pregnant that there would come a time when she was unable to do her job. It might have been three months in, maybe 8 months in - it varies from one pregnancy to another. So she will have to stop work a few weeks before she would have preferred. BFD.
These Democrat congresspeople are idiots, as are those who support them.
The truth sometimes hurts.