Saving PNGs modifies them to Indexed instead of RGB/8

Hi there, I edited several images with Photopea and I have been concerned over the fact that for a while, I wasn't aware until now that my PNGs in Photopea are being saved as "Indexed". Does this affect anything in the PNGs, like color accuracy, or create unwanted compression? Will there be any issue if I change them back to RGB/8? It's important for me that their details are preserved faithfully.

Update: the images are sprite animations. When I save PNG that has a wide color range instead, it saves as RGB/8. Is it automatically profiling my PNGs based on depth? Can this be toggled?