Question for moms

Hi everyone. I have almost 4 years toddler and 25 weeks pregnant. It was really hard to potty train her. Now couple of days she is peeing on her potty bu not poo. She is saying no poo kn potty. So dear momies help me how to make her to poo in potty or should i let her poo in diaper fo now? And second question what should i when we r outside? She is scared of toilet she will not sit on it. We r goimg outside on diaper now. Plz help me