I have used one of these
https://www.amazon.com/gp/product/B...ag=hawk-future-20&ascsubtag=UUacUvbUpU5604604
along with one of these
https://www.amazon.com/gp/product/B...ag=hawk-future-20&ascsubtag=UUacUvbUpU5604604
for a Nexus 5 on my road bike.
I liked the setup, but I have to admit that the Nexus 5 in question was a "spare" phone, not my primary which, at the time, was a Nexus 6 followed by a Nexus 6P. The 5 did drop to the road one time when the two halves of the Seidio case apparently were not fully locked together; the half with the mount adhered to the back stayed on the bike, the other half and the phone hit the road at about 18 mph and the phone suffered some damage to one corner.
Of course, that was my fault and not the fault of the mount itself which I would rate highly.
All in all, I would be really hesitant to stick my Pixel XL to my bike, no matter how good the mount.