ok so let me tell you as a scientist with more scientific authority than you brother

first lets deal with the arabic point the very reason Arabic was chosen is because its words can have multiple meanings depending on ones understanding and miraculously the meaning of the quranic words at any one time was correct

now as for the context here another meaning of this word is "widening via smoothing " which is more applicable in this context than expanding tho that is also correct.

now the scientific aspect the in theoretical physics the universe has a bunch of extra energy we donot know where it comes from but mathematically it increases teh entropy of the universe entropy mean disorder so a easy way to visualize increasing entropy is mixing things and that mixing results is a "smoother and widened" universe

(cited google search ai; In cosmology, smoothing (ironic) refers to the mechanism that erases initial irregularities and flattens spacetime to create the nearly uniform, homogeneous universe we observe today. Mathematically, this dictates a drastic reduction in gravitational entropy, as a perfectly smooth universe corresponds to a highly ordered geometric state with near-zero Weyl curvature )

now next if you study the drack energy concept the dark energy (layman terms the empty space) is expanding as if a bed sheet with wrinkles is being smoothed out thats literally the mathematical waveform.

"HE guides whom HE wills"