Why is Distant Horizons not loading anything more than a few chunks?

I have CPU Load set to Aggressive (I have an Intel Core i7-10875H CPU @ 2.30GHz, 2304 Mhz, 8 Cores, 16 Logical Processors) and Quality Preset at Medium (Running with an RTX 2070 Super). I've already pregenerated a very sizable area with Chunky (5,000 block radius) but it still doesn't go any farther than this. Anything I could be doing wrong?