If the order is pending you just need to get on the game and let the order process. At this point it probably has already done so. Dont forget to drive the car to LSC to apply the new plate. It doesnt just magically appear.
I wait for hours, no notifications (which are turned on btw). I go to LS customs in the car that I ordered the plates with on the app, no plate is there. Anything else?
hmm idk it took me a couple tries also. I just kept dashing and coming back. Eventually I placed an order while I was online and it went through and notified me in game instantly. I would say just keep trying and eventually it will work. The fact that your orders are pending is a good sign. They just need to go through.
I'm hearing "plates" You mean you have more than one?
yes albiet not entirely legit you can use a proxy server to edit the plate text before the order goes to the game. (It doesnt bypass the swear filter or "take" other peoples plates) people use rhis to get popular plates that are already taken like CNH 320 on a General lee
On topic. Did you try looking under plates in lsc and are you sure you are on the right platform?
I once ordered a plate and didnt realize i was on 360 not xbox one in the app