There is not enough reliable public evidence to state that Jen Stacy is wearing a wig as a fact. Search results around this question are mostly local social-media discussion, not direct confirmation from Stacy or her station.
Why the question appears
TV viewers notice changes in hair because anchors appear under bright lighting every day. A new cut, extensions, a topper, a wig, or recovery from a health procedure can all look like a dramatic change on camera.
What to avoid
Do not turn a viewer question into a diagnosis. Public people still deserve privacy around health, skin procedures, hair loss, and recovery.
Bottom line
There is no strong public confirmation that Jen Stacy is wearing a wig. The respectful answer is to treat it as speculation unless she chooses to discuss it herself.