Hi Jenn and welcome to the Board!
I'll give this a shot and others will chime in with their thought too.
Picture 1: Appears to be old insect damage. As long as it doesn't spread just leave it alone.
Picture 2: Yup, just leave it alone. Leaves often split on phals like this. Plus, since it's an older leaf it will most likely shed soon anyway.
Picture 3: This is just normal mechanical damage. The plant has been moved, picked up, put down, etc. As long as nothing gets larger or spreads they are fine.
Hope this is of some help.
AL
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