Perhaps more relevant to SE23 are the plans for the Catford stations area, which looks forward to 2022 when usage patterns are expected to be back to pre-pandemic levels:
The artists impression looks very nice, though it’s odd to see a car on the station access road (Adenmore Road) which isn’t currently a through road. Also the widening of the bridge maybe a “future aspiration … to develop a project with TfL to introduce a cantilevered walkway that will provide additional width to the south side of Catford Bridge this would create more space for pedestrians and provide a two-way cycle lane on the south side.”
The Lewisham Local plan summary does say the following about Forest Hill:
I’ve not found anything specific about the enhancement of the station approach, but given the plan marks the area around the station as a ‘growth node’ and earmarks sites on both sides of the tracks for flats it would be a real shame if there wasn’t also a thought to add another railway crossing or access to the station from the South side. A pedestrian & cycle bridge from the Southern car-park into Forest Hill centre could really join the two sides and give a step-free alternative to the ‘long way around’ along side the A205.