22 Tomato and 11 pepper plants, spacings a little tighter than it should be on some of the tomatoes, but it should be okay.
Yes, that’s why I have different varieties.
Sometimes, you plant multiple plants in a small area to get many fruits instead of few big ones. If I want 4 tomato varieties with less yield so I have options, instead of a single one, that’s totally possible.
You should also prune your tomatoes to select growth sites and maximize yield already anyways. So a dense canopy isn’t an issue. The planter is over 24” deep as well, the roots are fine.
For people who just plant and forget it, those are who should be following those guidelines.