Dead circuit off of GFI outlet
From your description a line in (the hot or feeder)
The load out (2 circuits going different directions).
Look at your line and load neutrals I see 3 wires on the line and only 2 on the load that will cause issues.
It also looks like one of the black hot’s has damaged insulation but it is a guess as it is fuzzy on my phone.
The line hot and neutrals should be connected on the line 2 wires looks like an extra neutral.
The load outputs should each connect to 2 circuits looks to be 1 short on the neutral.
Or did this get wired with line and load reversed I can’t quite tell on my phone.