Bell, Roger, and Telus all advertise 5G and 5G+ networks. 5G+ typically refers to an enhanced version of 5G technology that offers faster speeds and improved capabilities.
When connected to 5G+, you are likely on to the 3.5 GHz spectrum. Standard 5G, on the other hand, connects you to the 600 MHz and 1.7/2.1 GHz bands.