Felicity shows up and has a bullet scar on her left chest, a result of her being shot in The Benefactor (2016) by Rhys. Before she was shot, she was facing Rhys, yet when she fell down after being shot she was turned 90 degrees from him. The bullet scar shown indicated a straight entry wound, but if she was turned it would not have been the same wound seen here.
Felicity's bullet wound to her chest would have been fatal as it was shown to be for several other characters that were similarly shot in the series. As an example, in The Package (2016), two deputy marshals were shot once in the torso (lower than Felicity's gunshot) and each died instantly.