All the London railway stations :
Underground lines : London Overground (North London line)
I visited Homerton station in November 2021. The step onto the trains is a very large step. The exit and entrance to the platforms is either via steps or a steep ramp at the side of the platform.
Homerton station - in November 2021
Accessibility friendly : Yes, via steep ramp.
General description : Step free access from the platform (TFL). See wiki
More comment : National Rail Map & Guide .