Realme launched the GT line in 2021, which replaces the X series and offers top specs at mid-range prices. The other main line is the numbered series, like the Realme 7 or 8 - these often come with 5G and Pro versions, and have price tags which land them in the budget category.
In some regions, Realme has other lines, like the Narzo or V series, but these generally don't sell in any of TechRadar's main regions, so we haven't tested them. That's why you won't find them on this list.
If that changes, as we've heard it will for the Narzo line, maybe you'll see more handsets infiltrate this list soon.