Q.Do you pinch back gazania plants started from seed
My gazania seedlings are growing nicely but are getting quite tall. Can they be pinched back to make sturdier plants and, if so, how do you do it? It isn’t as clear cut where the pinching back should be like it is with other flower or veggie seedlings.

If your seedlings are quite young and getting tall, they are most likely not getting enough light. When starting seeds indoors
you most likely will need to use additional light source from grow lights. This will help your plants develop and not get
leggy. You should not pinch back your very young seedlings.
If your plants are older and larger, they could be cut back. I will trim back my gazania after they have their first bloom.
Here is a link about Gazania
https://www.gardeningknowhow.com/ornamental/flowers/gazania/gazania-treasure-flowers.htm