Nobody in the government is investigating this. From Celeste McGovern at lifesitenews.com:
Among the first reports handed over by Pfizer was a ‘Cumulative Analysis of Post-authorization Adverse Event Reports’ describing events reported to Pfizer up until February 2021

Netflix reality TV star Maya Vander told her fans last week of her devastating grief after she delivered a stillborn baby at 38 weeks of pregnancy December 9.
“Yesterday was the hardest day of my life,” Vander, 39, posted on Instagram, with a picture of new baby clothes in a memory box she was taking home from hospital instead of her baby boy. “I always heard of it but never imagined I’ll be part of the statistics.”
After her loss, she wrote in Insider magazine that she had felt less movement from the baby a few days before she learned her baby had died and also that her husband and two children were COVID-positive, although she had tested negative. She said the baby, who was “perfect” and weighed seven pounds and four ounces, would be autopsied.
There was a flurry of sympathetic news coverage about Vander’s loss, but not one article dared to ask burning questions: did COVID shots during her pregnancy have something to do with this baby’s death? Or did COVID have something to do with it, and the COVID shots failed?