Pretty simple. I don't understand why there's a Deselect All and not a Select All button. And perhaps it could go further and just select the first 200 items since there's a cap. On mobile its alright, but desktop its tedious not being able to click and scroll over the list to select multiple items at once anymore. Any suggestions to improve this suggestion, comment below!

Suggestion Improvements:
Fire 🔥BLM (#35734) - And being able to select a stack of items rather than having to click on multiple individuals of the exact same item.

Edit: You can click the one item then CTRL+SHIFT click another item towards the bottom to select everything in between, but this still seems tedious when there could just be a Select All function