I have some icon images which have these wavy edges from the source image. I have increased the size and resolution of the icons. I'm wondering if there's a way to make them straight and uniform with Photoshop. Either one at a time, or all of them together on one image. I'm fairly new to photoshop and couldn't find the answer to this question elsewhere. Using the warp tool didn't seem to do the trick for me, given the waviness of the lines.
Not in an easy way, no.
If you're assuming there's a button in Photoshop that you can click and boom the lines as straight, nope, there isn't a button for that.
Icons are generally constructed line by line. If this particular icon is distorted, that's probably what the author intended, or the file is broken somehow.
If you don't know how to redraw it, and not interested in learning how to do it, there are many icon websites where you can download identical symbols with straight lines. Many times these come in collections, meaning you get a large set of icons in the same style.
If you do attempt to rebuild it, safely assume Illustrator is the better tool for this. Using Photoshop is not impossible, but tricky. Either way you need to learn to use the app first.