Verizon runs 5G in two different spectrum ranges: sub 6-GHz (what they call "nationwide 5G") and mmWave (what they call "ultra wideband"). The former is most prevalent and is primarily used because of its higher efficiency and other advantages, but you won't necessarily see higher speeds than with LTE. Only in locations where mmWave spectrum is deployed will you possibly see much higher speeds, but those are still pretty rare (selected spots in major cities).