Tummy time vs sitting up

My daughter loves to sit. Shes been trying to do it from day 1 and at 3m old was able to hold herself in the sitting position for a min or 2. Now at 4m she can do it for 20 to 30mins at a time and is getting better everyday.

But she still absolutely hates tummy time. She will do it for maybe 5mins and then just lay her head down and scream.

She also has only rolled over 1 time from front to back and 1 time from back to front.

I'm proud of her for being able to sit so well but really worried that shes falling behind in the other areas

Should I be worried? And what can i do to catch her up with rolling and tummy time??

Pic of my girl because shes so cute ❤