@Julie thank you
Mines also 17 weeks and shows no real signs of rolling over. It’s okay! I’m a mom of 4 and they all rolled over at different times. I wouldn’t worry about it until baby is 6 months and still not showing interest in rolling. You can try placing toys slightly off to the side to encourage movement, also gently helping baby to roll by guiding them in the right direction.
It’s still very early no worries! My girl was an early roller but she loves tummy time and I think it helped. Laying baby on his side and playing with toys to make him look until he turns can help! Some babies don’t roll until 6/7m!