But likely would have inspector having more issue with conduit on surface and only secured to "loosely fitted" brick (ie sand locked pavers), not to mention it being a tripping hazzard (picture looks like placement is in a pedestrian pathway). Marker ribbon only required on service conductors, not bad idea otherwise also, but not required.
Picture looks like he will be doing trenching anyway to get power out there, and the hand layed pavers come up easy enough and likely already have a sand bed. And may need to remove some anyway for EP Bonding unless the hot tub meets all the requirements of 680.42(B).