IPhone XS Max Gold 256 GB for retail parts

Product Name: IPhone XS Max Gold 256 GB for retail parts
This was purchased brand new several years ago. Last summer some water damage recently occurred from it being in a damp backpack. We payed $300 to repair it but some issues were unresolved: Face ID doesn't work, wireless retail charging doesn't work, there is some border(seen in photo of screen off but doesn't show when screen is on) the battery health can't be displayed, there is a middle portion of the screen that recently stopped being responsive, there are green lines at the top and right side of the screen, there is a flash of the display when you first unlock the phone and sometimes it stays green. Comes with a two-piece otter box case. No scratches, cracks, or dents. Unlocked and wiped, hopefully you know phones well and can fix this.