Companion planting – plant spacing

Hello! This is my first time growing pole beans and daikon radish, as well as my first time companion planting. Beans and radishes are supposed to be good companions, but clear info on planting distance between these specific two is hard to find. Of course daikons are also very big radishes.

For now, the pole beans are not really taking off. It can be a number of reasons, but I was wondering if anyone here thinks the daikons are overcrowding the beans? They are now at approx 25 cm / 12 inch distance.

Thanks in advance!