You'll have to wait. Buying online will not allocate existing stock at the shop you selected as the pick up point. Your order will be delivered from the distribution center to the pick up location first.

It will probably take just a couple of days since it is not a new device. I had the same experience when I bought a S23 FE.

Its more like they forgot about your claim. I have traded in 3 devices now to CompAsia, the transfer happens immediately after the person comes to check and collect.

Once, my "friend" traded in a S21 with the back falling off and the battery was bloating. So he went to Shopee to buy some random phone adhesive to reseal the back. For the battery, poked it a bit to let the air or whatever the heck it was that was causing the bloat and sealed it back.

The person who came to inspect didn't suspect anything and paid the full quoted value for a no damage S21.

There isn't such an option baked in to allow this setting.

You can try installing Galaxy Max Hz and see if it works for you. There's a way to do it with this app but it is a paid application. Trial lasts 3 days or something.