No, though it might look like a mesh in a physical or logical diagram, they use point to multipoint FCC part 15 (unlicensed band) radio systems. Sector antennas, omnis, horns with systems such as the ubnt rocket AC radios, cambium pmp450, mikrotik 802.11ac based, etc.
And various types of PTP links for node-to-node links.
And various types of PTP links for node-to-node links.