Standing up leaves or rewching for light is mostly saying that the plant is healthy nd you are doing everything perfect. Untill they rise up so much that they seem to close up ; is a sign of extra heat and high amounts of light ; which is not the case here. So you are good to go.
Hi!
YEs I think this is really good sign!
They are "Praying" for the light and to me it looks like they are super happy when doing this.
I've read that it is the first sign of light stress but to me it looks more of a good thing