VBA2C, Flat pelvic bone

Hello! I'm currently 7w 3d with twins. I've had 2 c/s, neither were emergency.

First one I was induced because I was going into 41 weeks, I was in labor for a few hours and pushed for around 20 minutes, they said his head was turned awkwardly so they tried the vacuum and forceps, neither worked, so last-minute c/s.

My 2nd child was born about 4.5 years later, also c/s. This time I found out my pelvic bone was more flat rather than rounded so as long as it didnt look like the baby was going to be too large they would try for a vbac. The scan showed them at over 9lbs, he came out at 8lbs4oz.

Now I'm pregnant with twins, I dont know if their size would potentially be small enough to hopefully have a vba2c, or if my pelvic bone being flat would still hinder it. Any advice or ideas?