Really nice start !
It's in my opinion it's always a quicker step to seeing really good returns with increases from Synchrony cards when you can be approved for at least the first couple of them. Give them time (months) to develop a patterned history and at a point down the line, usually near 1 year and while also moving your TU FICO Score up in the process, you will see much more breathing room.
Congratulations on the good start!
$500 $1,000 $1,300 $1,500 $1,850 $3,400 $3,500 $9,500 $1,000