A Road Link is what you need if you want to go big. Probably not necessary for a 36 though.
https://www.wolftoothcomponents.com/products/roadlink
I have one. Unused thus far as the Ultegra Di2 GS cage copes fine with 36T.
@hippy started
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A Road Link is what you need if you want to go big. Probably not necessary for a 36 though.
https://www.wolftoothcomponents.com/products/roadlink