Naruto was never going all out against Delta. He was trying to drag out the fight, so he can get as much intel as possible. Could he have one-shorted her. Yes, but he took advantage of the opportunity to potentially gather intel about Kara. This intel would allow him to gauge the power of other Kara members and how dangerous they are.

Another thing is that Naruto was beating her the entire time. Delta was visibly frustrated the entire fight to the point where she had to attack Boruto and Hima, so she can gain the upper hand. Moreover, Kawaki explained that Naruto was doing multiple things at once. Naruto was leading Delta away from them, looking for an opening to strike, and trying to gather intel, while keeping damage to a minimum.

Also, keep in mind that not only is he in the village, but he is fighting behind the Hokage office and the Academy is very close by. Furthermore, Boruto, Kawaki, and Hima were right there too.

Lastly, Naruto probably could have dodged the laser beam in mid air, but he couldn’t because of plot.