https://bike.shimano.com/content/dam/e-tube/assets/images/contents/project/compatibillity/pdf/en/HM-CC_5.0.1-00-EN.pdf
It would appear so. Wiggle have some very cheap left hand di2 mtb shifters. I would imagine they can be programmed to shift the rear
@j_p_ started
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https://bike.shimano.com/content/dam/e-tube/assets/images/contents/project/compatibillity/pdf/en/HM-CC_5.0.1-00-EN.pdf
It would appear so. Wiggle have some very cheap left hand di2 mtb shifters. I would imagine they can be programmed to shift the rear