Download PS App and you'll see captures that you uploaded. I believe only uploaded captures are visible on the PS App. To upload simply send the content to someone else which will automatically upload it and you wont have to wait for it to upload manually. Or choose upload when you view the content but for me personally this is slower. Hope this helps.
i’ve had a look on my ps app and can’t find it anywhere. i’m on ps4 and ahh idk what to do. i’ve played it for a bit but never really looked into it as much
Oh you’re on PS4 that’s why. If you take a capture on the PS4, what I was doing was to send the picture by message to my second account then on the PS App I was able to save it. You can also use photo mode in the game to save and sent it directly to you Dovetail live account.