Like someone said you need to download them as usual, no backups for galaxy store skins. If it's something you paid for and would like access to make sure you log in using the same Samsung account as the previous device.
I've downloaded everything and I'm logged into my Samsung account. Nothing. Unfortunately Smart Switch isn't an option. The screen on my Note 20stopped working after I ended a Samsung Flow screen mirroring connection with it. The phone still vibrates when I take the stylus out and what have you, but it doesn't display anything. Force restart didn't work. I'm probably going to let it run totally out of battery and then try a factory restore when it's restarting.