Lol why did you show me this :)
I remembered how many times I had to remove the back seat and trim of my Renault when the fuel pump failed. In fact, it was serviceable, but, over time, the plastic case was deformed and the pump, periodically, jumped out of its groove. Add to that the stupid plastic cap nut that holds the fuel pump to the gas filler neck. The thread on the neck is deformed and when filling a full tank there is a risk that it will start to pour out. I think that such a design does not justify itself, it is much more convenient when the fuel filter and gasoline pump are under the hood of the car. Another point, in Renault, a float is installed on the body of the pump, which, also, after repair, starts to lie and I don’t know what the true gas mileage is. Good luck with the repair!