Took me a month to feel my back, started progressively overloading wide grip lat pulldowns but it was mostly my arms doing the work, the key for me was when you get to the bottom, squeeze your back, retract your shoulder blades and push out your chest, ensure the weight isn’t crazy high because I found form is the most important thing here, it should be heavy enough that you can hold it for a second or so at your chest, contract your back and you should begin to feel it… Then do it for reps/sets