I have been playing since it launched and all of a sudden I load in and my guns are not spawning in my hands. I can throw bombs but I can’t shoot. I loaded all the save files and it’s doing the same thing. I am too far in to start over. When I leave myself idle you can see my guns but once I move around they disappear. 

 

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I've also run into this issue. Reloading different saves doesn't work, rebooting the ps5 etc.
It's exactly as Khadijah said, can throw bombs, see the weapons when you go idle etc.

I dunno how to edit or else I would.
I kept swapping guns around in the menu and none of them worked. I tried a one-handed gun and that seemed to let me re-use guns.
I'm not sure if that's the actual fix for it, but a single-handed gun seemingly worked for me if anyone else runs into this glitch.

Have a nice day.