Range depends on frequency not on 5G versus 4G.
5g requires several orders of magnitude more cell towers. Per Verizon: 5G Tower Range. In general, the 5G Ultra Wideband network’s signal can reach up to 1,500 feet without obstructions.
Serviceable 4g is generally 4 to 5 miles.
It will be quite some time before you'll see 5g towers along rural roads every half-mile or so.